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作 者 ：刘正鲁;朱月林;胡春梅;魏国平;杨立飞;张古文

期 刊 ：应用生态学报 2007年 18卷 03期 页码：537-541

关键词：茄；

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，在营养液栽培条件下，对80 mmol·L^-1 NaCl胁迫下茄子嫁接苗和自根苗的光合特性、叶片抗氧化酶活性、活性氧代谢进行了比较.结果表明：NaCl胁迫下，茄子嫁接苗的干质量、叶绿素含量和光合速率分别比苏崎茄自根苗高67。8％、8。8％和31。1％，均有显著差异；抗氧化酶活性均显著高于苏崎茄自根苗，而O₂^-_·生成速率、H₂O₂和MDA含量则显著低于苏崎茄自根苗.NaCl胁迫明显降低了叶片叶绿素含量和光合速率，显著增加了O₂^-_·生成速率、H₂O₂和MDA含量，但嫁接苗受NaCl胁迫的影响小于苏崎茄自根苗，嫁接苗较强的耐盐性与NaCl胁迫下较高的抗氧化酶活性和较低的氧化损伤有关.

Abstract:By the method of hydroponics and with the salt-tolerant eggplant cultivar ‘Torvum Vigor’
(Solanum torvum) from Japan as rootstock and the cultivar ‘Suqiqie’ (Solanum melongena
L.) as scion, this paper studied the differences between grafted and own-root seedlings in their
photosynthetic characteristics, antioxidant enzyme activities, and reactive oxygen metabolism under
80 mmol·L^-1 NaCl stress. The results showed that under NaCl stress, the dry mass, chlorophyll
content and photosynthetic rate of grafted seedlings were 67.8%, 8.8% and 31.1% higher than
those of own-root seedlings, respectively, and the antioxidant enzyme activities were significantly
higher while the O₂^-_· producing rate and the hydrogen peroxide (H₂O₂) and malondiadehyde
(MDA) contents were significantly lower in grafted seedlings leaves than in own-root seedlings. For
both grafted and own-root seedlings, NaCl stress reduced the chlorophyll content and photosynthetic
rate, but increased the O₂^-_· producing rate and the H₂O₂ and MDA contents significantly. However,
the growth of grafted seedlings was less affected by NaCl stress. The stronger salt tolerance of
grafted eggplant seedlings was related to their higher antioxidant enzyme activities and less oxidative
damage.

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