NaCl胁迫对茄子嫁接苗叶片多胺代谢和ABA含量的影响  

Effects of NaCl stress on metabolism of polyamines and ABA content in leaves of grafted eggplants

作　　者：刘正鲁[1] 朱月林[1] 魏国平[1] 杨立飞[1] 张古文[1] 胡春梅[1] 

机构地区：[1]南京农业大学园艺学院,南京210095

出　　处：《生态学报》2008年第4期1586-1592,共7页Acta Ecologica Sinica

基　　金：国家教育部高校博士点基金资助项目(20030307020);江苏省科技厅资助项目(BC2003306;BE2002304)~~

摘　　要：以日本引进的茄子设施栽培专用耐盐品种‘Torvum Vigor’为砧木,栽培品种‘苏崎茄’为接穗,研究了80 mmol.L-1NaCl胁迫下茄子嫁接苗和自根苗生长、多胺代谢和ABA含量的变化。结果表明,在NaCl胁迫下,茄子嫁接苗的生长量、3种不同形态多胺(游离态、结合态和束缚态)和ABA含量均显著高于自根苗。NaCl胁迫显著增加了叶片精胺和ABA含量;腐胺和亚精胺含量在胁迫前期上升,后期下降。嫁接苗的腐胺和亚精胺含量降低幅度低于自根苗,而精胺和ABA含量上升幅度则高于自根苗。嫁接苗生长和多胺代谢受NaCl胁迫的影响小于自根苗,NaCl胁迫下ABA的快速积累和保持相对高的多胺含量与嫁接苗耐盐性有关。‘Torvum Vigor’（ Solanum torvum Swartz）, a salt tolerant rootstock and eggplant cultivar ‘Suqiqie’ （ Solanum melongena L. ） as scion, were used to study the effect of NaC1 stress （ 80 mmol·L^- 1 ） on metabolism of polyamines and abseisie acid （ABA） content in leaves of grafted and non-grafed seedlings. The results showed that plant growth, polyamines contents （free, conjugated and bound ） and ABA content were significantly higher in grafted seedlings than non-grafted seedlings under NaC1 stress. NaC1 stress also significantly increased spermine （ Spin ） and ABA contents in leaves. It was also observed that putrescine （Put） and spermidine （Spd） contents were increased during early stages and gradually decreased both in grafted and non-grafted seedlings. However, the decrement of Put and Spd contents in leaves of grafted seedlings was lower than that of non-grafted seedlings, while the increment of Spin and ABA contents of grafted seedlings was higher than that of own-root seedlings. The growth and polyamines metabolism of grafted seedlings were less affected by NaCl stress than non-grafted seedlings. It is concluded that both the rapid accumulation of ABA and higher polyamine contents might be involved in stronger salt tolerance of grafted eggplant seedlings.

关 键 词：嫁接茄子 NACL胁迫 多胺 脱落酸 

分 类 号：S641.1[农业科学—蔬菜学]