NaCl胁迫对4种砧穗组合苹果的生长及光合特性的影响  

Effect of NaCl Stress on Growth and Photosynthetic Characteristics of Apple on Four Different Rootstock-scion Combinations

作　　者：卢艳[1] 王飞[1] 韩明玉[1] 赵亮明[1] 李涛[1] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《西北农业学报》2011年第8期106-110,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家现代苹果产业技术专项(2008ZDGC-0)

摘　　要：以4种盆栽3 a生不同砧穗组合的苹果苗为试材,研究不同质量分数的NaCl(0.2%,0.4%,0.6%)胁迫后苹果叶片叶绿素含量、细胞膜透性、叶片生长量及光合特性变化规律。结果表明,NaCl胁迫下,不同砧穗组合的净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)的变化规律,叶绿素含量和叶片生长量均随NaCl质量分数的增加而降低,细胞膜透性随NaCl胁迫质量分数的增加而增加。叶绿素b对NaCl胁迫的敏感性高于叶绿素a。不同砧穗组合的耐盐性有差异:用M26做基砧,其上嫁接长富2号,耐盐性要优于嫁接富红早嘎;用八棱海棠做基砧,其上嫁接嘎啦耐盐性要优于陕富3号。NaCl胁迫下,各砧穗组合光合能力均降低,气孔限制因素在0.2%胁迫时起主导作用,而在0.4%、0.6%胁迫时,气孔限制因素和非气孔限制因素共同起作用。Aiming to provide advice for the selection of NaCl-resistance tree type and NaCl-resistance mechanism,four group of three years old apple trees cultivated in the pot with different rootstock-scion combinations were stressed by NaCl with different concentration（0,0.2%,0.4% and 0.6% NaCl） in the treated soil.The effect of NaCl stress on the synthesis of chlorophyll,conductivity leaf areas and the photosynthetic capacity were investigated.The results showed that the net photosynthetic rate（Pn）,stomatal conductance（Gs）,transpiration rate（Tr）,the content of chlorophyll and leaf growth reduced,but cell membrane permeability increased when increasing stress concentration of NaCl.Chlorophyll b was more sensitive to salt stress than chlorophyll a.NaCl-resistance of different rootstock-scion combination were different： the NaCl resistance of Changfu 2 grafted on M26 Rootstock was superior to that of Fuhungzaoga;the NaCl resistance of Gala grafted on Begonia rootstock was better than that of Shaanfu No.3.The photosynthesis decline in the low-salinity stress was principally influenced by stomatal limitation,and in the middle and high salinity stress,stomatal limitation and non-stomatal limitation plays a role commonly.

关 键 词：苹果 砧穗组合 NACL胁迫 叶绿素 细胞膜透性 光合能力 

分 类 号：S661.1[农业科学—果树学]