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Effects of simulated microgravity on the growth of plant seedlings

Zhao Qi, Liu Min, Cai Weiming

Institute of Botany,Chinese Academy of Sciences.Beijing 100093；China

Abstract

When the seedlings of strawberry and carnation were cultured while rotating around a horizontal axis on a clinostat, their photosynthetic characteristics were different from the control: (1) there were some increases in height and number of leaves per plant; (2) the content of chlorophyll in strawberry declined by 47.5% and that in carnation increased by 4.3%; (3) there was no change in position of the main absorption peaks, but the intensity of them was increased; (4) there were significant increases in the parameters of chlorophyll fluorescence inductive kinetics except CA/F_(0) (complementary areas of fluorescence rise); (5) there were some differences in excitation energy distribution between the two photosystems, but no function of chloroplasts was impaired.

Key words: Microgravity;Photosynthetic characteristic;Strawberry;Carnation

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Citing This Article：

Zhao Qi, Liu Min, Cai Weiming. Effects of simulated microgravity on the growth of plant seedlings. Acta Physiol Sin 2000; 52 (3): (in Chinese with English abstract).