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LEAF AND APICAL GROWTH CHARACTERISTICS IN TRITICUM |
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| Authors: | Lance S. Evans Arthur R. Berg |
| Affiliation: | Department of Plant Sciences, University of California, Riverside Pacific Southwest Forest and Range Experiment Station, Forest Service, U. S. D. A., Berkeley, California, stationed at Riverside, California |
| Abstract: | Leaf initiation rate, leaf primordium growth rates, and apical volume growth rates were determined for seedlings of Triticum aestivum cv. Ramona 50 under controlled environmental conditions. Three leaf primordia are present in the caryopsis, and three more leaves are initiated within the first two weeks after germination with a mean plastochron length of 95.5 hr. Volume growth rates of the apical region were determined on six apices which had six primordia each. The mean radial expansion rate was 0.467/plastochron, and the vertical expansion rate was 0.457/plastochron. The volume expansion rate was 1.393/plastochron. The mean volume doubling time was 0.498 plastochrons or 47.1 hr. |
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