切花月季‘萨蔓莎’和‘加布里拉’失水胁迫耐性的差异  

Physiological Bases of Difference Related to Water Deficit Tolerance of Cut Rose cv.Samantha and Gabriella

作　　者：张常青[1] 唐雪梅[1] 高俊平[1] 张颢[2] 熊丽[2] 

机构地区：[1]中国农业大学观赏园艺与园林系,北京100094 [2]云南省农业科学院花卉研究开发中心,昆明650205

出　　处：《园艺学报》2002年第6期556-560,共5页Acta Horticulturae Sinica

基　　金：国家自然科学基金资助项目 (3 9870 490 ) ;云南省省校 (院 )合作项目 (99YN0 2 )

摘　　要：不同失水胁迫条件下的研究结果表明 :切花月季耐失水胁迫品种‘萨蔓莎’和不耐失水胁迫品种‘加布里拉’的瓶插寿命缩短百分比、鲜样质量损失率、相对电导率、花朵乙烯生成量都随胁迫程度的增加而增加 ,叶片、花朵水势随胁迫程度的增加而下降 ,萨蔓莎的变化幅度比加布里拉小。中度失水胁迫的叶片和花瓣SOD、POD活性高于轻度和重度胁迫。两个品种的叶片气孔阻力没有明显区别。瓶插期间 ,相同失水胁迫时间 ,萨蔓莎复水恢复能力比加布里拉强。讨论了月季切花上述参数与失水胁迫耐性之间的关系。In our previous work,17 commercial cultivars of cut rose( Rosa hybrida )were classified into three levels of tolerance to water deficit by measuring the vase life decrease after 24h water deficit,at 22-25℃ and 40%-60% relative humidity.In this paper,Samantha,a cultivar with strong tolerance to water deficit,and a weak one,Gabriella,were used to determine their vase life,fresh mass loss,water potential of flowers and leaves,leaf stomatal resistance,relative electrolyte conductance,flower ethylene production,SOD and POD activities of petals and leaves under water deficit.The results showed that as prolonging the time of water deficit,the decreased percentage of vase life,fresh mass loss,relative electrolyte conductance and flower ethylene production increased,while water potentials of flowers and leaves decreased in both cultivars;and more remarkable changes were obtained in cv.Gabriella than in Samantha.SOD and POD activities of petals and leaves were higher in medium range of water deficit than in light and heavy ones.And no remarkable difference of leaf stomatal resistance was found between the two cultivars.Samantha showed a higher abilities to recover from the same water deficit than Gabriella during vasing period.Finally the relationships were discussed between the test parameters of petals and leaves and water deficit tolerance of cut roses.

关 键 词：失水胁迫耐性 月季 切花 失水胁迫 品种差异 瓶插寿命 叶片气孔阻力 相对电导率 

分 类 号：S685.12[农业科学—观赏园艺]