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 peanut (Arnhis hypogaea L.) plant is indeterminate in growth habit and day-neutral with respect to flower initiation. The Spanish-type cultvar used in this study begins flowering 3 to 4 weeks from planting under optimum environmental conditons. In this study, irradiance and photoperiod were used to alter the development of the peanut plant. Plants grown at low irradiance (300 microeinsteins per square meter per second) had the same number of leaves as the plnts grown at high irradnce (500 microeinsteins per square meter per second), 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-hour photoperiods at the high irradiance showed that the 16-hour photoperiod produced the largest amount of vegetative, but least amount of reproductive components. The plants grown at 8-hour photoperiod had one-third as much total leaflet area as plants grown at 16 hours, but six times more weight of mature seeds. The larger amount of photosynthetic surface (leaf area) did not result in more reproductive growth. The results indicate that the peanut plant may readily redistribute its available assimilates between vegetative and reproductive growth In response to irradiance and photo period.

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Light effects, Indeterminate plant
Author Affiliation: SEA, USDA, Texas A. & M. Univ., College Station, USA.
Subjects: Crop Improvement
Plant Physiology and Biochemistry > Plant Physiology
Divisions: Groundnut
Depositing User: Mr Arbind Seth
Date Deposited: 28 Mar 2013 14:06
Last Modified: 01 Apr 2013 09:57
Official URL:

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