生态学杂志2011，Vol.30Issue(8)：1620-1626,7.
外源NO对NaCl胁迫下长春花幼苗生物量和叶绿素荧光的影响
Effects of exogenous nitric oxide on biomass and chlorophyll fluorescence of Catharanthus roseus seedlings under NaCl stress
摘要
Abstract
A pot experiment in greenhouse was carried out to study the effects of different concentration exogenous NO donor ( sodium nitroprusside, SNP) on the biomass, chlorophyll content, and chlorophyll fluorescence of Catharanthus roseus seedlings under the stress of 50 mmol NaCl · L-1. Among the treatments with SNP, the seedlings treated with 50 mmol NaCl · L-1＋ 0. 1 mmol SNP · L-1 had the highest fresh weight and dry weight, being significantly higher (18. 8％ and 13. 9％ , respectively) than the control (50 mmol NaCl · L-1). Similar to biomass, the chlorophyll a, chlorophyll b, and carotenoid contents in treatment 50 mmol NaCl · L-1 ＋ 0. 1 mmol SNP · L-1 were the highest, but had no significant differences with the control. The variation trend of chlorophyll a／b was more complicated. Applying 0. 1 mmol · L-1 of SNP had the best effect in mitigating the salt damage to Ps Ⅱ reaction center, which increased the fluorescence ( Fv ) , maximal fluorescence ( Fm ) , light energy transformation efficiency of PS Ⅱ ( Fv／Fm ) , activity potential of PS Ⅱ ( Fv／Fo) , actual photochemical efficiency of PS Ⅱ ( (￠)PSⅡ ) , and photochemical quenching (qp) markedly, and decreased the minimal fluorescence (Fo) and non-photochemical quenching (qN) obviously. To sum up, 0. 1 mmol · L-1 of SNP had the best effect in protecting chlorophyll and PS Ⅱ reaction center against salt damage, and also, could promote the growth of the seedlings and enhance their tolerance to 50 mmol Ⅱ L-1 NaCl stress.关键词
一氧化氮/盐胁迫/长春花/叶绿素荧光Key words
nitric oxide/ salt stress/ Catharanthus roseus/ chlorophyll fluorescence.分类
农业科技引用本文复制引用
胡凡波,刘玲,隆小华,刘兆普..外源NO对NaCl胁迫下长春花幼苗生物量和叶绿素荧光的影响[J].生态学杂志,2011,30(8):1620-1626,7.基金项目
国家科技支撑项目(2011BA13B09)和公益性行业(农业)科研专项(200903001-05)资助. （2011BA13B09）
