NaCl胁迫对大黄龙船花幼苗生长及光合特性的影响  

Effects NaCl Stress on the Growth and Photosynthesistic Characteristics of Seedling Ixora collinea ‘Gillettese How'

作　　者：陆銮眉[1] 蔡月琴[1] 张琼[1] 

机构地区：[1]闽南师范大学生物科学与技术学院,福建漳州363000

出　　处：《热带作物学报》2015年第12期2161-2165,共5页Chinese Journal of Tropical Crops

基　　金：福建省科技重点项目"龙船花植物遗传多样性和繁育技术体系研究"(No.2012N0032);闽南师范大学园林植物生长发育与生态配置创新(2013)

摘　　要：为探讨大黄龙船花的耐盐生理特性和耐盐能力,采用盆栽试验技术研究不同浓度Na Cl（0、0.2%、0.4%、0.6%、0.8%、1.0%和1.5%）对大黄龙船花幼苗生长及光合特性的影响。结果表明：Na Cl胁迫使参试植物生长受到明显抑制,随着Na Cl浓度的增加,大黄龙船花的叶绿素含量、光合速率（Pn）、蒸腾速率（Tr）和气孔导度（Gs）均呈下降趋势,胞间C02浓度（Ci）呈现先降低后升高的趋势;Na Cl浓度与大黄龙船花的Pn、Tr、Gs极显著负相关,与Ci、WUE不相关。综合分析大黄龙船花属于盐敏感植物,较低Na Cl（0.2%～0.6%）胁迫就对其生长和光合参数产生抑制,不适宜在盐碱地推广。The aim of the study was to analyze the physiological properties of salt tolerance in Ixora coUinea ‘Gillettese How＇. The effects of salt stress （0, 0.2%, 0.4%, 0.6%, 0.8%, 1.0% and 1.5%） on the growth and photosynthesis of pot culture I. collinea ‘Gillettese How＇ were studied to uncover the. salt tolerance. The results showed that salt stress inhibited significantly the growth of I. Collinea ‘Gillettese How＇. The content of chlorophylls, net photosynthetic rate （Pn）, stomatal conductance （Gs） and transpiration rate （Tr） reduced with the NaC1 concentrations increased. The intercellular CO2 concentration （C i） was decreased firstly but increased subsequently with NaC1 concentrations increased. Significantly negative correlations were found between Pn, Tr, Gs and NaaCI concentrations. However there was no significant correlation between Ci and NaaCI concentrations. The results showed that even low NaaCI stress （0.2%-0.6%） significantly inhibited the growth and photosynthesis of I. collinea ‘Gillettese How＇. Thus it was concluded that I. collinea ‘Gillettese How＇ was sensitive to salt stress and should not be cultivated in alkali-saline land.

关 键 词：NACL胁迫 大黄龙船花 幼苗生长 光合特性 

分 类 号：S685.99[农业科学—观赏园艺] Q948.113[农业科学—园艺学]