Light effects on development of an indeterminate plant

Ketring, D.L. (1979) Light effects on development of an indeterminate plant. Plant Physiology, 64 (4). pp. 665-667.

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The Spanish-type groundnut cv. Starr begins flowering 3-4 wk after sowing in opt. environmental conditions. In this study, irradiance and photoperiod were used to alter the development of the sp. Plants grown at low irradiance (300 mu E/m2 s) had the same number of leaves as the plants grown at high irradiance (500 mu E/m2 s) but they had a larger leaf surface area and were taller than plants grown at the high irradiance. However, flowering and other reproductive components (pegs, pods and seeds) were reduced at low irradiance. Comparison of 8-, 12- and 16-h photoperiods at the high irradiance showed that the 16-h photoperiod produced the largest amount of vegetative, but least amount of reproductive components. The plants grown at 8-h photoperiod had 33% as much total leaflet area as plants grown at 16 h, but 6 times more wt. of mature seeds. The larger amount of photosynthetic surface (leaf area) did not result in more reproductive growth. The results indicated that the groundnut plant may readily redistribute its available assimilates between vegetative and reproductive growth in response to irradiance and photoperiod.

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Spanish-type peanut, irradiance, plant culture, Photoperiod.
Author Affiliation: SEA, USDA, Texas A. & M. Univ., College Station, TX 77843, USA.
Subjects: Plant Production
Crop Improvement
Divisions: Groundnut
Depositing User: Mr Balakrishna Garadasu
Date Deposited: 02 Apr 2013 04:43
Last Modified: 02 Apr 2013 04:43
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