Source-sink relationship in Abelmoschus esculentum L. |
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Authors: | RM Bhatt NK Srinivasa Rao |
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Institution: | (1) Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Hessarghatta, Bangalore, 506 089, India |
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Abstract: | The ontogenetic changes in source-sink relation associated with the manipulation of reproductive sink at different positions
on the plant in two okra cultivars (Arka Anamika and Pusa Makhamali) with distinct branching habit (cv. Arka Anamika tends
to branch at the middle nodes unlike cv. Pusa Makhamali) were analysed. The cultivar differences for extension growth were
nonsignificant except at treatment where all flowers and flower buds upto 8th mode were removed. The reproductive sink reductions
resulted in a decrease of total dry matter accumulation per plant to an extent of 13 to 46% in Arka Anamika and 18 to 34 %
in Pusa Makhamali. Fruits on the middle nodes appear to be prominent sinks for photo assimilates in cv. Arka Anamika. The
reproductive sink manipulation did not result in any particular change in the trend of photosynthesis, but brought about a
significant change in the partitioning of dry matter.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | cultivar differences dry matter accumulation internal CO2 concentration leaf position okra photosynthetic rate stomatal conductance |
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