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作 者 ：刘正鲁,朱月林,魏国平,杨立飞,张古文,胡春梅

期 刊 ：生态学报 2008年 28卷 4期 页码：1586~1592

关键词：嫁接茄子；NaCl胁迫；多胺；脱落酸；

Keywords:grafted eggplant, NaCl stress, polyamine metabolism, abscisic acid,

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-1 NaCl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。

Abstract:‘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 NaCl stress (80 mmol•L-1) on metabolism of polyamines and abscisic 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 NaCl stress. NaCl stress also significantly increased spermine (Spm) 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 Spm 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.

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