Effect of daylength on flowering and seed morphology ofSpergularia diandraoccurring in the Negev Desert, Israel |
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Authors: | Yitzchak Gutterman |
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Institution: | Jacob Blaustein Institute for Desert Research and Dept. of Life Sciences, Ben-Gurion University of the Negev, Sede Boker Campus 84990, Israel |
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Abstract: | Spergularia diandrais a common annual plant in the deserts of Israel. It displays a quantitative long-day response to flowering. The longer the daylength, from 8 to 18 h, the earlier the time of flowering. Tiny wind-dispersed seeds, which mature on plants under these daylengths, differed in their seed coat structure and size. In addition, in natural populations nine types of seeds were found: three plant genotypes with smooth, hairy or partially hairy seeds; and within each genotype there are three seed phenotypes: black, brown and yellow. The flowering and ‘escape’ strategy of seed dispersal diversity are discussed. |
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Keywords: | daylength escape strategy flowering genotypes seed coat structure wind dispersal |
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