水生生物学报2017，Vol.41Issue(3)：671-676,6.DOI:10.7541/2017.85
共生与非共生爪哇伪枝藻对高温胁迫的响应
RESPONSE TO HIGH TEMPERATURE STRESS IN SYMBIOTIC AND FREE-LIVINGSCYTONEMA JAVANICUM
摘要
Abstract
Biological soil crusts (BSCs) are widely distributed in global arid and semi-arid environment, where high temperature stress is one of the critical environmental factors to control the survival of algae. As a common species in BSCs,Scytonema javanicum appears in alga crust stage as free-living form and in lichen crust as symbiotic form to regu-late the formation and development of BSCs. This study explored the effect of high temperature stress (45℃) on symbio-tic (ss) and free-living S. javanicum (fs). The results showed that high temperature stress declined the photosynthetic activity more dramatically in ss compared with in fs, and high temperature stress induced a higher biomass in ss com-pared with in fs. Compared with fs, ss had lower growth rate and MDA content, and faster extropolysaccharides-re-leased and soluble protein- to protect from damages. The results showed that, compared with free-living form, the S. javanicum from lichens had higher self-protection efficiency when exposed to high temperature.关键词
生物结皮/爪哇伪枝藻/自由生长/共生/高温胁迫/生理生化Key words
Biological crust/Scytonema javanicum/Free/Symbiosis/High temperature stress/Physiological and biochemical分类
生物科学引用本文复制引用
雷亚萍,许丽红,曾臻,吴丽..共生与非共生爪哇伪枝藻对高温胁迫的响应[J].水生生物学报,2017,41(3):671-676,6.基金项目
国家自然科学基金(31300100)资助 Supported by the National Natural Science Foundation of China (31300100) （31300100）
