Photosynthetica 1999, 36(14):621-625 | DOI: 10.1023/A:1007183811186

Influence of Drought, High Temperature, and Carbamide Cytokinin 4-PU-30 on Photosynthetic Activity of Plants. 2. Chloroplast Ultrastructure of Primary Bean Leaves

D. Stoyanova1, I. Yordanov2
1 Department of Botany, Faculty of Biology, Sofia University, Sofia, Bulgaria
2 Institute of Plant Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria

Ultrastructural changes in chloroplasts of primary leaves of 15-d-old bean plants (Phaseolus vulgaris L. cv. Cheren Starozagorski) in response to a single stress (increasing water deficit, WD) as well as to combined stress (WD plus high temperature, WD+HT) were investigated under the possible protective or reparatory effects of the carbamide cytokinin 4-PU-30 [N-(2-chloro-4-pyridyl)-N-phenylurea] applied before or after the stress. Essential structural changes in chloroplast ultrastructure occurred mainly in plants that had experienced WD+HT: the thylakoids were swollen, the envelope was destroyed, and the spatial orientation of inner membrane system was not typical. Changed starch accumulation was also observed. 4-PU-30 protected chloroplast ultrastructure under WD+HT.

Additional key words: membrane system; Phaseolus vulgaris; starch; stress; thylakoid

Prepublished online: December 1, 2000; Published: December 31, 1999  Show citation

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Stoyanova, D., & Yordanov, I. (1999). Influence of Drought, High Temperature, and Carbamide Cytokinin 4-PU-30 on Photosynthetic Activity of Plants. 2. Chloroplast Ultrastructure of Primary Bean Leaves. Photosynthetica, 37(4), 621-625. doi: 10.1023/A:1007183811186
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