Abstract
SummarySignificant changes in starch, total nitrogen and dry weight occurred 4, 5, 6, 7, 8 and 11 days after planting in the cotyledons of developing bean seedlings, cv. Greenpod 478. These changes were significantly correlated with increases in plant dry weight and an increase in top : root ratio from 2.8 : 1 at emergence (4 days) to 5.6 : 1 at cotyledon senescence (11 days). Although 57% of the cotyledons of cv. Slimgreen were cracked, the pattern of changes in the constituents and associated plant growth was similar to that for Greenpod 478, but the magnitude was generally smaller. Subsequent tests to determine the effect of cracking on changes in cotyledon constituents showed marked influences of this type injury on the starch and total nitrogen contents in cotyledons and on top growth.
Published Version
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