生态学杂志2011，Vol.30Issue(10)：2209,1.
低氧胁迫下钙对樱桃根系功能及氮代谢的影响
Effects of applying calcium on the functions and nitrogen metabolism of cherry root system under hypoxia stress
摘要
Abstract
By the method of controlling dissolved oxygen concentration in nutrient solution, this paper studied the effects of applying calcium to the nutrient solution on the functions and nitrogen metabolism of cherry root system under hypoxia stress. As compared to the control, applying calcium significantly increased the root activity, mitigated the inhibition effect of hypoxia on root respiration rate, and improved the activities of enzymes involved in nitrogen metabolism, such as nitrate reductase (NR) , glutamine synthethase (GS) , and glutamate dehydrogenase (NADH-GDH). All these effects could supply enough energy for root respiration, supply NAD+ to glyco-lytic pathway, promote the electron transfer, and consequently, alleviate the harm of hypoxia stress to cherry plant. Applying 10 mmol·L-1of Ca2+ had better effects than applying 5 mmol · L-1of Ca2+. Calcium deficiency under hypoxia stress significantly decreased the root activity and NR, GS, and NADH-GDH activities, and aggravated the root respiration inhibition. It was suggested that applying calcium in growth medium could mitigate the damage of hypoxia stress on cherry root system.关键词
樱桃/低氧胁迫/钙/根系功能/氮代谢Key words
cherry/hypoxia stress/calcium/root system function/nitrogen metabolism分类
农业科技引用本文复制引用
生利霞,冯立国,束怀瑞..低氧胁迫下钙对樱桃根系功能及氮代谢的影响[J].生态学杂志,2011,30(10):2209,1.基金项目
江苏省自然科学基金项目(BK2009717)和扬州大学科技创新培育基金项目(2010exj079)资助. （BK2009717）
