摘要
海洋浮游植物的光合作用固定了占全球将近40×10-2的碳,但对于制约浮游植物生物量和初级生产力的诸多因子却研究较少。近来许多研究表明,不论是在氛盐的高值还是低值水域,铁元素的供应对浮游植物的生物量、生长率、种类组成及初级生产力均会产生影响。一些生理的和分子生物学的指标可用来指示铁对浮游植物的限制.这些指标包括:叶绿素a、光系统Ⅱ光化学反应的量子产率、以及某些特定酶的活性如过氧化氢酶、脂氧合酶、黄素氧还蛋白等。
Phytoplankton photosynthesis in the world's oceans accounts for approximately 40×10-2 of global carbon fixation, yet identification of the factors limiting primary productivity and phytoplankton biomass has been elusive. Iron supply has been referred to as a factor to influence phytoplankton biomass, growth rate and species composition as well as primary productivity in both high and low NO3- water. Several physiological or molecular indices such as chl-a, the quantumy yield of photosystem Ⅱ of photochemical reaction, activities of specific enzymes, for example,catalase, lipoxygenase, flavodoxin etc, have been applied to indicate the status of iron limitation on phytoplankton.
出处
《黄渤海海洋》
CSCD
1997年第3期51-56,共6页
Journal of Oceanography of Huanghai & Bohai Seas
基金
国家自然基金!39570141