嫁接对茄子根系分泌物中肉桂酸和香草醛的调节效应

茄子根系分泌物中普遍存在肉桂酸和香草醛等化感物质.本文采用盆栽试验研究了嫁接对这两种物质的调节效应.结果表明：嫁接降低了茄子根系对这两种物质的分泌，尤其是显著降低了对香草醛的分泌，与自根茄子相比，嫁接使根系分泌的肉桂酸最多降低68.96%，香草醛最多降低100%.在外源肉桂酸和香草醛胁迫下，特别在外源肉桂酸胁迫下，与自根茄子相比，嫁接促进了茄子植株的株高、茎粗，使叶绿素含量增加5.26%～13.12%，降低了根系电导率和MDA含量，提高了根系的SOD活性，明显缓解了肉桂酸的胁迫.

Regulation effects of grafting on cinnamic acid and vanillin in eggplant root exudates.

Cinnamic acid and vanillin are the allelochemicals commonly existed in eggplant root exudates. With pot culture experiment, the regulation effects of grafting on the cinnamic acid and vanillin in eggplant root exudates were studied, and the results showed that grafting decreased the amount of the two substances, especially of vanillin, in eggplants root system. The maximum reduction amount of cinnamic acid reached 68.96%, and that of vanillin reached 100%. Under the stress of exotic cinnamic acid and vanillin, especially of exotic cinnamic acid, grafting relieved the autotoxicity of the two substances on eggplants. Compared with own-rooted eggplant, grafted eggplant had a higher plant height and a larger stem diameter, its leaf chlorophyll content increased by 5.26%-13.12%, root electric conductivity and MDA content decreased, and root SOD activity enhanced.