| 嫁接西瓜根、茎叶的化感效应及化感物质的鉴定 |
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| 引用本文： | 郑阳霞,唐海东,李焕秀,贺忠群,秦耀国.嫁接西瓜根、茎叶的化感效应及化感物质的鉴定[J].核农学报,2011,25(6):1280-1285. |
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| 作者姓名： | 郑阳霞 唐海东 李焕秀 贺忠群 秦耀国 |
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| 作者单位： | 四川农业大学园艺学院,四川雅安,625014 |
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| 基金项目： | 四川省教育厅重点科研项目，四川农业大学青年科技创新基金 |
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| 摘 要： | 以南瓜作砧木嫁接西瓜,研究嫁接西瓜的根、茎叶浸提液对西瓜种子发芽和幼苗生长的化感效应,并对嫁接西瓜根和茎叶中的化感物质进行了GC-MS检测。结果表明,2.5、5、10和20g/L 4个浓度的浸提液（西瓜/南瓜嫁接苗,南瓜自根苗,西瓜自根苗的根、茎叶）对西瓜种子发芽和幼苗生长均呈现出低促高抑的规律。浸提液浓度为2.5g/...
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| 关 键 词： | 西瓜 嫁接 根、茎叶 化感效应 化感物质 |
| 收稿时间： | 2011-03-15 |
| 修稿时间： | 2011-05-24 |
ALLELOPATHIC EFFECT AND IDENTIFICATION OF ALLELOCHEMICALS IN GRAFTED WATERMELON ROOT AND STEM-LEAF |
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| ZHENG Yang-xia,TANG Hai-dong,LI Huan-xiu,HE Zhong-qun,QIN Yao-guo.ALLELOPATHIC EFFECT AND IDENTIFICATION OF ALLELOCHEMICALS IN GRAFTED WATERMELON ROOT AND STEM-LEAF[J].Acta Agriculturae Nucleatae Sinica,2011,25(6):1280-1285. |
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| Authors: | ZHENG Yang-xia TANG Hai-dong LI Huan-xiu HE Zhong-qun QIN Yao-guo |
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| Institution: | College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014 |
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| Abstract: | Allelopathic effect of root and stem-leaf aqueous extracts in watermelons grafted with pumpkin as rootstocks were studied. The allelochemicals in root and stem-leaf samples were detected by GC-MS. The results showed that the seed germination and seedling growth of watermelon was increased when the root and stem-leaf aqueous extracts on lower concentration, and decreased at extracts on higher concentration. The root and stem-leaf aqueous extracts promoted the seed germination and seedling growth of watermelons at 2.5g/L, and began to inhibit at 10g/L for all extracted solutions. The root and stem-leaf aqueous extracts from grafted watermelons with lower concentration had stronger effect on the seed germination and seedling vegetal promotion of watermelons than that of own-rooted watermelon, while the retarding effect was less than that of own-rooted watermelon at higher concentration. The identification of allelochemicals in root and stem-leaf of grafted watermelons indicated that the categories and the relative contents were different from the own-root plants. The substances, such as 2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5-thiadiazinan-4-one was detected only in root of grafted watermelons. The substances, such as 1,4-Dichloro-2,5-dimethoxybenzene,2-chloro-N-(3-methoxy-2-thenyl)-2',6'-dimethylacetanilide and S-4,6-diamino-1,3,5-triazin-2-ylmethyl O,O-dimethyl phosphorodithioate were detected only in stem-leaf of grafted watermelons. Grafting considered as one of the effective methods for relieving the continuous cropping barrier caused by autotoxicity. |
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| Keywords: | watermelon grafting root and stem-leaf allelopathic effect allelochemicals |
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