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Distribution of Growth

Distribution of GrowthMethodology: Seed Germination

after 3 hoursafter 10 hoursMethodology:Seed Germination

after 24 hoursafter 48 hours

Methodology:Initial Measurement

Methodology:48 Hour Growth Period

MethodologyFinal Measurement

Results and DiscussionRaw Data (Part I)Seed No. DIVISIONS12345Lo, mmLf, mmLDLo, mmLf, mmLDLo, mmLf, mmLDLo, mmLf, mmLDLo, mmLf, mmLD125.13.1225.33.3424.22.2623.31.3822.60.610224.32.3224.92.9424.32.3622.90.9822.90.910324.22.2224.92.9423.11.1623.51.5822.70.710425.23.2225.33.3423.81.8622.80.8822.60.610525.13.1225.23.2423.91.9622.70.7822.40.410 AV2.782 AV3.124 AV1.866 AV1.048 AV0.6410Results and DiscussionRaw Data (Part II)SeedNo. DIVISIONS678910Lo, mmLf, mmLDLo, mmLf, mmLDLo, mmLf, mmLDLo, mmLf, mmLDLo, mmLf, mmLD122.50.51222.40.41422.10.1162201822020222.40.41222.30.31422.20.21622.10.11822020322.20.21222.20.21422.20.2162201822.10.120422.10.11222.30.3142201622.20.21822.10.120522.50.5122201422.10.1162201822020 AV0.3412AV0.2414AV0.1216AV0.0618AV0.0420Results and DiscussionProcessed Data

Results and DiscussionApical Meristem, Zones of Growthgrowth occurs in three zones of cells in successive stages zones are not distinct and have no clear boundaries

Results and DiscussionPlant Hormone, Auxinchief function of auxin is to stimulate cell elongationincreases the activity of the proton pumps allowing the cell to become more acidic

Distribution of Growth: ShootsSeeds were germinated on a tissue paperAfter five days 4 seeds of approximately similar in length were chosen.

Distribution of Growth: ShootsFour seedlings with stems of approximately similar length were selectedTen 2-mm divisions were marked off from the tip of the shootThese were then placed in a dark cabinet for 72 hours. They were watered every night

Distribution of Growth: Shoots

Distribution of Growth: ShootsDIVISIONLENGTH (mm)PLANT 1PLANT 2PLANT 3PLANT 4AVERAGE13012917172532520525.753251115413.754135847.55105546675445764454.75844333.5932222.251032222.25Distribution of Growth: ShootsDistribution of Growth: Shoots

Distribution of Growth: StemsIs growth uniform throughout the marked stem?NOIf not, where are the regions of the most active growth?On the average, the most active growth took place in the 2nd division, followed by the 1st and then by the 3rd.

Distribution of Growth: StemsThe auxin hormone, which is also referred to as indoleactic acid at low concentration and gibberellins stimulate cell elongation, and the presence of the apical meristems are the one responsible for the result. They together to promote elongation through the auxins ability to acidify the cell well and activate expansins, and the gibberellins facilitation of expansins penetration. The shoot apical meristem which is a dome-shaped mass of dividing cells found at the tip of the terminal bud is also responsible for this growth (Campbell and Reece 2005).

Day 1Four germinated sprouts with primary leaves showing were potted, and the outline of the leaves were traced on 5x5 mm graphing paperDistribution of Growth: LeavesPrimary Leaf Growth: Day 3

Specimen1Specimen 2Specimen3Specimen4Primary Leaf Growth: Day 5Specimen1Specimen 2Specimen3Specimen4

Primary Leaf Growth: Day 7Specimen1Specimen 2Specimen3Specimen4

Primary Leaf Growth: Day 9Specimen1Specimen 2Specimen3Specimen4

Primary Leaf Growth: Day 15 (no change from Day 11)Specimen1Specimen 2Specimen3Specimen4

DaySpecimen 1Specimen 2Left CotyledonRight CotyledonLeft CotyledonRight CotyledonLength (mm)Width (mm) Total Area (mm2)Length (mm)Width (mm) Total Area (mm2)Length (mm)Width (mm) Total Area (mm2)Length (mm)Width (mm) Total Area (mm2)1155651645516340153303219125231014519810020690532143603015375291225027112007391862536196003316500311437594321840422181037196153719615114825114046231090432184043228601348251140462310904321840432286015482511404623109043218404322860Recorded lengths and areasDaySpecimen 3Specimen 4Left CotyledonRight CotyledonLeft CotyledonRight CotyledonLength (mm)Width (mm) Total Area (mm2)Length (mm)Width (mm) Total Area (mm2)Length (mm)Width (mm) Total Area (mm2)Length (mm)Width (mm) Total Area (mm2)1184601857519585185753237120248130247125248130525111852612210311334031122907291331030143503416550331547593416550351657038186003818600113820660392068043218404120725133820660392068043218404120725153820660392068043218404120725Calculated DataOverall AverageAverage Growth Between IntervalsDayLength (mm)Width (mm) Total Area (mm2)Length (mm)Width (mm) Total Area (mm2)116.8754.2560.625n/an/an/a322.257.875120.6255.3753.62560528.87512.5276.256.6254.625155.625733.12515.625473.1254.253.125196.87593818.56504.8752.875176.8751142.62521.5854.3754.6253204.3751342.62521.5854.3750001542.62521.5854.375000AnalysisBased on the findings, it can be deduced that leaf expansion favors the increase of length over the increase in widthStill, leaf expansion occurs proportionally throughout the blade, so that the original shape is basically maintained; this differs from root and shoot growth, wherein increase in size is disproportionate along the entire length as areas nearest the tips (where the meristems are located) experience the longest expansion.References[1] Campbell, Neil A., and Jane B. Reece. "Plant Response to Internal and External Signals." Biology. 7th ed. San Francisco: Pearson, Benjamin Cummings, 2005. Print.[2] Campbell, Neil A., and Jane B. Reece. "Plant Structure, Growth, and Development." Biology. 7th ed. San Francisco: Pearson, Benjamin Cummings, 2005. Print.