干旱区生态环境知识资源中心(Arid): 失水-吸水过程中微鞘藻光合活性的特性

Arid

	失水-吸水过程中微鞘藻光合活性的特性
其他题名	RECOVERY OF PHOTOSYNTHETIC ACTICITY OF MICROCOLEUS VAGINATUS AFTER WATER LOSS AND REHYDRATION
	陈兰洲; 谢作明; 李敦海; 刘永定; 王高鸿
ISSN	1000-3207
出版年	2006
卷号	30 期号:4 页码:404-407
中文摘要	雨季来临时，干藻重新吸收水分，光合活性恢复，迅速生长。微鞘藻（Microcoleus vaginatus）藻体在失水过程中，光合活性降低；而干藻接种到流沙后，恢复生长，在生长后期，生物量可达27mug／cm^2土壤。在重吸水中，离子对光合活性的恢复具有重要作用，相对于去离子水来说，BG-11培养液处理后活性恢复较高；K^＋和Mg^2＋的缺失，对光合活性有抑制作用，而Ca^2＋的缺失，造成光合活性恢复的延缓；较高浓度的胞外多糖（Extracellular polymeric substances，EPS）和热水溶性多糖（500mg／L），较低浓度的蔗糖（100mg／L），对光合活性的恢复和保持具有促进作用。结果表明，在光合重吸水过程中，离子在促进光合恢复中起重要作用，而糖类在保持细胞形态上具有重要的作用，这对于利用干藻进行流沙接种试验具有非常重要的意义。
英文摘要	Desiccated filaments restore photosynthetic activity and grow rapidly after rehydration when the rainy season comes. Photosynthetic activity off Microcoleus vaginatus decreased during the process of water loss, and the biomass of man-made algal crust reached maximum about 27mug Chl a/cm^2 after inoculated onto unconsolidated sand. It is important for ion concentration in the recovery of photosynthetic activity in rehydration process. Compared with distilled water, photosynthetic activity recovered high after wetted with BG -11 medium. Compared with the recovery of BG-11, photosynthetic activity were inhibited by the deficiency of K^＋ and Mg^2＋ , and it was retarded by the deficient of Ca^2＋, while N and A5 didn＇t have a significant change. The recovery of photosynthetic activity was enhanced by the addition of 500mg/L EPS, HWP and 100mg/L sucrose. It indicated that some ion contents （K, P, Mg, Ca^2＋） played an important role in the recovery of photosynthetic activity, and EPS, HWP and sucrose may play an important role in keeping cell morphology.
中文关键词	荒漠藻类 ; 重吸水 ; 失水 ; 光合活性 ; 恢复
英文关键词	Desert algae Rehydration Water loss Photosynthetic activity Recovery
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2606404
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220117
作者单位	中国科学院水生生物研究所, 武汉, 湖北 430072, 中国
推荐引用方式 GB/T 7714	陈兰洲,谢作明,李敦海,等. 失水-吸水过程中微鞘藻光合活性的特性[J],2006,30(4):404-407.
APA	陈兰洲,谢作明,李敦海,刘永定,&王高鸿.(2006).失水-吸水过程中微鞘藻光合活性的特性.,30(4),404-407.
MLA	陈兰洲,et al."失水-吸水过程中微鞘藻光合活性的特性".30.4(2006):404-407.