摘要
稳定碳同位素组成(δ13C)综合反映了植物的生理生态特征,可用于研究植物生理与生态环境之间的关系。大多数研究认为植物δ13C值随盐度增加而变重。盐分主要通过影响C3植物叶片气孔传导、光合作用等生理活动,使植物δ13C值发生变化。而有些植物为适应盐分胁迫可能发生光合途径的转换,使C3代谢转换成C4或CAM代谢,导致植物某些器官的δ13C值发生变化,而植株整体δ13C值变化较小。由于植物δ13C与土壤盐分的关系还受其他环境因素的影响以及室内试验的有限性,因此进一步扩大盐度梯度范围,延长盐处理时间以及开展大田试验显得很有必要。
Abstract Stable carbon isotope composition （δ^13 C） can synthetically reflect the eco-physiological characteristics of plants, and be used to study the relationship between plant and ecological environment. Many studies reported that the ohange of δ^13C value of plants was positively correlated with salinity. Soil salinity changed the δ^13C value of C3 plants through affecting their physiological activities, such as stomatal con-ductance and photosynthesis. The high salinity-induced switch from C3-photosynthesis of some plants to Crassulacean Acid Metabolism or C4- photosynthesis adapted to the adverse environment and changed the δ^13C value of some plant organs, but the δ^13C value of whole plants changed slightly. The relationship between ~3C and salinity was influenced by other environmental factors and limited conditions of laboratory experiments, thus it became necessary to broaden the range of salinity, extend the salt treatment time and carry out field experiment.
出处
《安徽农业科学》
CAS
2012年第9期5515-5520,共6页
Journal of Anhui Agricultural Sciences
基金
山东省自然科学基金项目(ZR2011DM007)
烟台市科技攻关项目资助(2010163)
关键词
植物δ13C值
盐度
气孔导度
光合作用
δ^13C value of plants
Salinity
Stomatal conductance
Photosynthesis
