with general reference to fig1 - 6 , the plant growth system of the preferred embodiment includes a base or root vessel 10 , an expandable shoot chamber 11 and a means 12 for injecting water into or extracting water from the root vessel 10 . in the preferred embodiment , the shoot chamber 11 is selectively connectable to , or positionable relative to , the root vessel 10 , with the chamber 11 and a root chamber 15 of the vessel 10 being substantially aligned , so that seeds that germinate and begin to grow in the root chamber 15 will grow into the shoot chamber 11 . with continuing general reference to fig1 - 6 and more specific reference to fig3 and 5 , the base or root vessel 10 comprises a tray - like structure having a centrally located recessed area defining a root volume or chamber 15 . in the preferred embodiment , the root volume 15 is defined by the wall portion 16 . the wall portion 16 includes a side wall portion and a bottom wall portion . a substantially planar , laterally extending lip 18 ( fig3 ) is integrally joined with the top edge 17 of the wall portion 16 and extends outwardly therefrom . the peripheral , laterally extending lip 18 includes end lip portions 19 and 20 and side lip portions 21 and 22 . a pair of shoot chamber connection flaps 24 and 25 are hingedly connected respectively to the outer edges of the side lip portions 21 and 22 . these flaps 24 and 25 are designed to be rotated up and over the respective lip portions 21 and 22 to capture a respective bottom edge portion of the shoot chamber 11 , and thus selectively retain or connect the shoot chamber 11 to the base or root vessel 10 . in the preferred embodiment , the lip portions 21 and 22 are provided with a pair of outwardly extending projections 26 and the flaps 24 and 25 are provided with corresponding complementary recessed portions 28 . when the flaps 24 and 25 are pivoted upwardly and onto the top surface of the lip portions 21 and 22 , the projections 26 are inserted or snapped into the recessed portions 28 to retain the flaps 24 and 25 relative to the lip portions 21 and 22 . this selectively secures the shoot chamber 11 to the base 10 . the base or root vessel 10 also includes a pair of wire clips 29 or other means for retaining the shoot chamber 11 in a collapsed position and in selected expanded positions . the clips 29 include wire , legs 30 which in the preferred embodiment are connected with the base 10 . this connection may be accomplished by extending end portions of the clips 29 through holes in chamber 15 and retaining the clips therein by bending the ends toward one another or by connecting inner ends of the clips 29 to the underside of the lip portions 19 and 20 . the clips 29 also include upwardly and inwardly extending generally u - shaped wire portions 31 . these portions 31 are designed for connection with a portion of the shoot chamber 11 as shown and described below . the clips 29 are designed to be bent outwardly for a limited distance to allow the shoot chamber 11 , or a collapsed portion of the chamber 11 , to pass the clips . when released , these inwardly extending u - shaped portions 31 return to the position shown in fig1 and 3 to engage and retain a selected portion of the shoot volume 11 adjacent to and in alignment with the root chamber 15 . this bending movement of the clips 29 may be facilitated by the flexible nature of the lip portions 19 and 20 or by otherwise hingedly connecting the clips 29 to the lip portions 19 and 20 . the base or root vessel 10 may be constructed of a variety of materials and may be transparent , translucent or opaque . in the preferred embodiment , the base 10 is constructed of a thin plastic material which can be blow molded , injection molded , or otherwise formed in a single step into the configuration of the base 10 , such as bips or rpvc , and with or without uv inhibitors . as shown best in fig3 and 5 , the root volume 15 is provided with a means for injecting and / or extracting water from the root volume 15 . this means is in the form of the water injection / extraction tube which includes a tube portion 32 positioned within the chamber 15 and a tube portion 34 . the tube portion 34 is in communication with the tube 32 and extends out of the chamber 15 and joins with a connection end 35 . in the preferred embodiment , the tube portion 32 is provided with a plurality of tiny openings to allow for the dispersion or extraction of water from the chamber 15 . alternatively , the tube portion 32 may be comprised of a soaker tube material without discrete openings . the tube portion 32 may be of any configuration and may be in any position within the chamber 15 as long as it effectively provides water to and / or extracts water from the chamber 15 as desired . as shown in fig3 and 4 , the tube portion 32 is retained relative to the bottom wall of the chamber 15 by the pair of raised portions 13 , 13 . the tube portion 34 joins with , and is in communication with , the tube portion 32 . when assembled , the tube portion 34 extends through a slit 36 between the lip portion 21 and the flap 24 as shown best in fig3 and 4 . this permits the flap 24 to be folded onto the lip portion 21 without interfering with the water injection / extraction means 12 . the connection end 35 is connected with a pump or other means such as a syringe to manually or automatically provide water to or extract water from the chamber 15 and the growth media therein . if desired , as shown in fig1 , the means 12 can be connected with a separate water impervious liner 23 . as shown , the liner 23 has a size and configuration similar to the chamber 15 to allow the liner 23 to be inserted within the chamber 15 . in this embodiment , a portion of the tube 34 is connected with an extended lip 27 extending outwardly from one top edge of the liner 23 . when joined with the base 10 , this portion of the tube 34 and the lip 27 extend through the slit 36 . a smaller , outwardly extending lip 33 extends around the remaining top edge of the liner 23 . the liner is preferably formed of a thin , flexible plastic material which may be transparent , translucent or opaque . as shown best in fig5 , the root chamber 15 , or the liner 23 of fig1 , is provided and filled with growth media 38 . this growth media can be any material which will facilitate the germination and growth of the seeds embedded therein . examples of such a media include arcillite combined with osmocote slow release fertilizer . this is the preferred media . other possible materials include vermiculite , balkanite , porous clay material , peat , garden soil and common cat litter , among others . when the plant growth system of the present invention is assembled , seeds 39 of a desired plant are embedded in the growth media 38 for future germination and growth . these seeds 39 may be individually positioned within the media or may be provided within the media on a seed tape or the like . in certain embodiments as shown best in fig3 and 5 , a root or media barrier 40 is provided . this barrier 40 is provided on top of the media 38 as shown in fig5 and functions to define a root volume that may or may not contain the root media 38 and to limit or otherwise control the light which reaches the seeds and the root system . the root media 38 may be of particulate , foam , peat , or other materials that allow passage of liquid and gas phases . if desired , the root media 38 may be replaced by hydroponic liquid flows that provide sufficient oxygen to the root . the barrier 40 may be provided with one or more holes 41 or slits 42 to allow the sprouts from the seeds 39 , and thus the plants , to grow through the barrier 40 and into the shoot chamber 11 . the barrier 40 can be made of a variety of materials such as , but not limited to , foam , plastic , paperboard or the like . the barrier 40 is preferably opaque . as indicated above , the moisture or percentage of water within the chamber 15 can be controlled manually or automatically . fig7 shows a system by which the moisture within the chamber 15 may be controlled automatically . as shown in fig7 , a pump 44 is provided to pump water from a water supply 45 to the chamber 15 or to extract water from the chamber 15 and return it to the water supply 45 . the pump 44 may be manually controlled or , if desired , automatically controlled via a controller 46 . the controller 46 may be designed to maintain the pump at a certain preset pressure ( either positive or negative ) relative to the chamber 15 and the growth media therein . the controller may also control the pump in response to actual moisture conditions within the chamber 15 via a moisture sensor 48 . in general , depending upon the media being utilized and the type of plants which are to be grown in the media , the moisture content within the chamber should be between about 50 - 80 %. the shoot volume or chamber 11 in accordance with the preferred embodiment comprises an expandable volume or chamber which may be stored in a fully collapsed position as shown in fig1 or may be expanded to a fully expanded condition as shown in fig2 and 6 , or any partially expanded position in between , during use . in the preferred embodiment , the chamber 11 includes an open bottom and a closed top 49 ( fig2 ) and a plurality ( preferably four ) side walls 50 . if desired , the chamber 11 can also embody a single , continuous side wall configuration such as a cylinder with a circular , elliptical or other shaped cross - section . as shown , in the preferred embodiment , these side walls 50 are pleated to permit the entire shoot chamber 11 to be expanded to accommodate the plant growth within the chamber or collapsed for storage or during non - use . in the preferred embodiment , the bottom pleat at the ends of the side walls 50 , opposite to the top 49 , engage the peripheral lip 18 of the base 10 , with the bottom pleat edges of opposite side walls 50 being captured or sandwiched between the lip portions 21 and 22 and the respective hinged flaps 24 and 25 . the bottom pleat edges of the other opposite side walls 50 are retained relative to the lip 18 , and in particular the lip portions 19 and 20 , by the retaining clips 29 . when the shoot chamber 11 is in its fully collapsed position as shown in fig1 , the retaining clips 29 function to retain the chamber 11 in its collapsed position by extending and clipping over the top 49 . as the chamber 11 is expanded , the clips 29 can be outwardly flexed and then allowed to snap back into retaining position to engage any one of the plurality of pleats along the side walls 50 . this enables the expansion , and thus the size , of the chamber 11 to be manually controlled in response to the plant growth . by minimizing the expansion of the chamber 11 when the shoot is small , the light source can be moved closer to the shoot to facilitate enhanced growth . the shoot chamber 11 can be made from a variety of materials . preferably it is constructed of a thin plastic , substantially transparent material or other material that allows sufficient growth light to reach the shoot within the chamber 11 . the material is also preferably sufficiently stiff to maintain an upright , expanded position . the material should also preferably be such that when external forces are removed , it will tend to assume an expanded , or at least partially expanded , position . examples of such materials are mylar or teflon . although the preferred embodiment shows pleated side walls 50 as the means for providing an expandable volume or chamber 11 , other means could be utilized as well . examples include side walls of flat plastic sheets on a roll , support columns filled with air , wire embedded in the bellows walls , or any other deployable structure that enables the shoot chamber to be selectively collapsed and expanded . the shoot chamber 11 of the preferred embodiment has an open bottom , however , if desired , a bottom can be provided . such bottom may have one or more openings which correspond to openings in the barrier 40 ( fig3 ) or with the position of seeds in the chamber 15 to accommodate growth of shoots through such holes . as shown best in fig2 and 6 , the chamber 11 is provided with a selectively controllable opening or vent 14 . this opening 14 enables the interior of the shoot chamber 11 to be in communication with the ambient environment conditions for the purpose of controlling the temperature , humidity and other environmental conditions within the chamber 11 . depending upon the ambient temperature and humidity , and the desired temperature and humidity in the chamber 11 , the vent 14 is either closed , or opened to a certain size . although a variety of structures may be provided to facilitate a controlled opening within the chamber 11 , the structure of the preferred embodiment , as shown best in fig6 and 8 includes a pair of wire sections 51 , 51 connected to separated portions of opposite side walls 50 , a pair of wire sections 52 , 52 connected with a separated portion of a third side wall 50 and a wire section or other hinge connection at a point 54 on the fourth side wall 50 of the chamber 11 . as shown best in fig8 , the wire sections 51 and 52 are integral with one another and are joined by a loop 55 . a piece of stiff , but compressible , plastic tubing or other structure 56 extends through the loops 55 as shown to adjust the extent to which the wire sections 52 , 52 are separated from one another . this adjustment is made manually by sliding the tubing 56 through the loops 55 , with the extent of the opening being retained by friction between the tubing 56 and the loops 55 . the relative position of the tubing 56 and the loops 55 defines the size of the opening or vent 14 within the chamber 11 . as indicated , the structure shown in fig6 and 8 is but one of many possible structures that can be provided to adjust the opening vent 14 in the chamber 11 . preferably , however , such means must be capable of providing an adjustable opening or vent within the chamber 11 . such means must also preferably be near its upper end , to control the temperature , humidity and other environmental conditions within the chamber 11 . the manually adjustable vent opening 14 as shown in the embodiment of fig6 is particularly applicable when the growth system is maintained at a location where the ambient humidity , temperature and other conditions are compatible with the desired environment within the shoot chamber 11 . if the ambient environmental conditions are not compatible , means such as a transport tube or duct 57 a and 57 b of fig9 may be used to introduce the desired atmosphere ( humidity , temperature , atmospheric composition , etc .) into , or remove atmosphere from , the chamber 11 . in this case , the vent 14 may be closed . introduction of desired environmental conditions into the shoot chamber 11 may be done manually or may be done automatically as shown in fig9 . fig9 shows a system in which the environment within the shoot chamber 11 may be automatically controlled for temperature , humidity , composition , and other characteristics . in a preferred embodiment , atmosphere in the shoot chamber 11 is transported or moved from the chamber 11 by a transport duct or tube 57 a . the duct 57 a enables the shoot environment atmosphere to be transported or moved through or past apparatus 58 that change the temperature , apparatus 59 that change humidity and apparatus 60 that affect or change the atmospheric composition . preferably , the alternation of the shoot environment passing through the apparatus 58 , 59 and 60 is controlled by suitable control systems 62 , 63 and 64 respectively . the movement of the atmosphere from the chamber 11 through the apparatus 58 , 59 and 60 , and back into the chamber through the duct 57 b is controlled by the pump or other air movement means 69 . the extent to which the atmosphere of the chamber 11 is altered by the apparatus 58 , 59 and 60 may be controlled by the controllers 62 , 63 and 64 to maintain the temperature , humidity and other environmental conditions at desired preset levels . alternatively , the controllers 62 , 63 and 64 can be connected with sensors 65 located within the chamber 11 . in this case , the environmental conditions of the atmosphere passing through the tube 57 would be controlled in response to the environmental conditions measured by the sensors . although controllers 62 , 63 and 64 and the sensors 65 are desired for full automated control , the environmental conditions of the atmosphere passing through the duct 57 may be altered without these elements . further , if desired , some aspects of the atmospheric change may be skipped by using bypass flow controllers such as those identified by reference character 61 in fig9 . such flow controllers 61 may be controlled manually or automatically . the system of fig9 also includes a light source 67 which is integrated within the top of the shoot chamber 11 . this light source may be a conventional growth light , fluorescent light , a plurality of leds or any other light source that is conducive to plant growth . the on / off status of the light source 67 as well as the intensity of the light source 67 is controlled by a controller 66 . if desired , the controller 66 may be controlled in response to a light sensor ( such as one of the sensors 65 ) to monitor actual light conditions within the shoot chamber environment . as illustrated schematically in fig9 , all of the control systems 62 , 63 , 64 and 66 may be integrated , if desired , to a higher level of control 68 . use of a control such as that shown by reference character 68 , which provides control input to each of the control systems 62 , 63 , 64 and 66 , would enable changing of the various atmospheric conditions , and thus control thereof , from remote user inputs or from data obtained from the individual control systems . multiple assemblies such as those shown in fig2 and 6 may be linked together with similar or different plant species . these multiple assemblies may be controlled passively or actively through control means and systems such as those shown in fig7 and 9 . also , although not specifically illustrated , multiple root chambers , and related components could be included under a single shoot chamber 11 to maintain separation , if desired , of roots of similar or different plants , while still maintaining the same environmental conditions in the shoot chamber 11 . similarly , multiple shoot chambers 11 could be positioned over a single base or root chamber 16 . having described the structure of the plant growth system of the present invention in detail , the assembly and use can be understood best as follows . first , a base 10 with water dispersion / extraction means provided is filled with root media . seeds of a desired plant are then dispersed within the root media either individually , on a seed tape or otherwise . if needed or desired , a media or root barrier such as the foam barrier 40 is positioned on top of the media . utilization of a barrier 40 is particularly desired in zero gravity conditions or in other embodiments where the systems may be tipped upside down or otherwise not retained in a horizontal position . the shoot volume 11 is attached to the base either before or after placing the seeds and retained in its collapsed position by the clips 29 . because the root media is dry , the seeds will not germinate , and thus plant growth will not begin . this enables the entire system to be stored for extended periods of time , up to a year or more , without seed germination . when it is desired for the system to be activated , water is supplied to the root growth media through the water dispersion tube 32 . by supplying a pre - selected amount of water or by over watering and then extracting a certain volume of water , the moisture content within the root volume 15 can be controlled . as the seed germinates and sprouts , the sprout will grow through the hole 41 or slit 42 in the barrier 40 ( if provided ) and begin to grow into the shoot chamber 11 . to accommodate this growth , expansion of the shoot chamber 11 may be controlled by use of the clips 29 engaging intermediate pleats , and temperature , humidity and other environmental conditions within the shoot chamber 11 are controlled via the vent 14 . when the shoot is small , the chamber 11 should preferably be in a partially expanded condition . this permits the light source to be as close as possible to the shoot . although the description of the preferred embodiment has been quite specific , it is contemplated that various modifications could be made without deviating from the spirit of the present invention . accordingly , it is intended that the scope of the present invention be dictated by the appended claims rather than by the description of the preferred embodiment .
a storable , portable and expandable plant growth system that allows preparation of seed and root media material in a storable state and selective activation through the injection of liquid when germination and growth is desired .