Fine Chloroplast Structure in Cucumber and Pea Leaves Developed under Red Light

Fine Chloroplast Structure in Cucumber and Pea Leaves Developed under Red Light Photosynthetic activity, the content of various photosynthetic pigments, and the chloroplast ultrastructure were examined in the leaves of cucumber (Cucumis sativus L.) and pea (Pisum sativum L.) plants of different ages grown under red light (600–700 nm, 100 W/m2). In pea leaves tolerant to red-light irradiation, chloroplast ultrastructure did not essentially change. In the first true leaves of cucumber plants susceptible to red-light irradiation, we observed a considerable increase in the number and size of plastoglobules, the appearance of chloroplasts lacking grana or containing only infrequent grana, and stromal thylakoids. In the upper leaves of 22-day-old cucumber plants, the chloroplast structure was essentially similar to that of the control chloroplasts in white light, and we therefore suppose that these plants have acclimated to red light. Russian Journal of Plant Physiology Springer Journals

Fine Chloroplast Structure in Cucumber and Pea Leaves Developed under Red Light

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2000 by MAIK “Nauka/Interperiodica”
Life Sciences; Plant Sciences
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