升温对丛生盔形珊瑚两种形态型代谢和共生藻光合生理的影响

doi:10.11978/2021078

Abstract

Abstract:

The effects of warming on the metabolism and photosynthetic physiology of symibiodiniaceae of two morphological types (H and S) of a reef-building coral, Galaxea fascicularis, were studied. The results showed that the physiological responses of H-type and S-type to warming were clearly different. At the symibiodiniaceae level, H-type lost a large number of symibiodiniaceae, and reduced the burden of respiratory metabolism of symbionts. In S-type, the number of zooxanthellae could still maintain the needs of symbionts for respiratory metabolism, while increasing the content of chlorophyll b to enhance light absorption. At the host level, the H-type made full use of nutrients delivered by zooxanthellae and compensated for energy consumption through heterotrophic feeding. The nutrients stored by the S-type host could assist the symbionts to adapt to the thermal environment. Galaxea fascicularis adapted itself to environmental changes through different energy utilization modes, i.e., H-type tended to maintain the metabolic balance of the symbiont, while S-type intended to improve the energy distribution of symbiotic algae.

Key words: Galaxea fascicularis, symbiotic algae, warming, morphological types, metabolism, photosynthetic physiology

CLC Number:

P735.542

HE Qian, YU Xiaolei, LIANG Yuxian, ZHANG Zhe, HUANG Hui, ZHOU Weihua, YUAN Xiangcheng. Effects of warming on the metabolism and photosynthetic physiology of the symbiotic algae of two morphological types of Galaxea fascicularis[J].Journal of Tropical Oceanography, 2022, 41(5): 133-140.

Figures/Tables 4

References 42

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Effects of warming on the metabolism and photosynthetic physiology of the symbiotic algae of two morphological types of Galaxea fascicularis

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