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Approach of allelopathy study with Arabidopsis thaliana (L.) Hevnh. and Neurospora crassa 总被引：2，自引：0，他引：2
KAORI TOMITA-YOKOTANI TAKAKO KATO MOHAMMAD MASUD PARVEZ YASUHEI MORI NOBUHARU GOTO KOJI HASEGAWA 《Weed Biology and Management》2003,3(2):93-97
Allelopathy in Arabidopsis seeds was investigated in the present study because there are few available reports of allelopathy studies regarding the early development stage of the plant life cycle, and because Arabidopsis is widely used as a model plant for molecular biology. When cockscomb ( Celosia cristata ) was incubated together with Arabidopsis seeds, the growth of cockscomb was promoted by Arabidopsis seeds. Exudate of Arabidopsis seeds showed a promotive activity on the growth of cockscomb and Arabidopsis itself. A new method for studying allelopathic mechanisms involving the interaction of the plant Arabidopsis thaliana (L.) Hevnh. and the fungus Neurospora crassa was suggested. Arabidopsis seed exudate and the water-soluble fraction of the exudate promoted Arabidopsis growth and reduced fungal germination, indicating that the seed exudate has a species-selective activity. Conversely, the ethylacetate-soluble fraction inhibited growth of all tested materials in the current study. These results demonstrate that the water-soluble substance(s) released from Arabidopsis seeds have species-selective activity on growth of both plants and microorganisms. 相似文献
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YOSHIHARU FUJII TOMOKO SHIBUYA KEIKO NAKATANI TOMIO ITANI SYUNTARO HIRADATE MOHAMMAD M. PARVEZ 《Weed Biology and Management》2004,4(1):19-23
In order to elucidate the allelopathic effect of leaf litter leachates under laboratory conditions, a modified 'sandwich method', which places leaves between two layers of agar, was used. Fifty mg of leaves was used per 10 cm2 cell. Agar concentrations at 0.5–1.0% were the best for gel support in determining radicle and hypocotyl elongation of lettuce. The optimum incubation time for bioassay was three days after imbibition onset. Among 20 typical tree species in Asia, Cymbopogon citratus and Derris scandens showed the strongest inhibitory activity determined by the sandwich method, followed by Piper betle, Tamarindus indica, and Gliricidia sepium. This bioassay seems to be a reliable method for screening allelopathic activity from leaf litter leachates. 相似文献
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对芋病毒病及类似病害症状进行调查,其症状表现主要分为羽状花叶、叶片向上卷曲并伴有黄化或花叶、脉间黄化、明亮褪绿黄斑、褪绿斑点(斑驳)及叶片皱缩和叶缘黄化。采用RT-PCR和PCR技术对随机采集的32份表现症状的鄂芋一号样品进行了芋花叶病毒(DsMV)和芋杆状病毒(TaBV)2种病毒的检测,检出率均为68.8%。同时,利用30%毒氟磷可湿性粉剂500倍液和1 000倍液对芋病毒病进行田间药效试验,第一次施药后10 d调查,毒氟磷可湿性粉剂500倍液和1 000倍液的防治效果分别为30.9%和24.9%;第二次施药后15 d调查,500倍液和1 000倍液防治效果分别为72.8%和59.4%。田间药剂试验结果表明,毒氟磷可湿性粉剂500倍液比1 000倍的防治效果好,从田间芋头长势可看出,毒氟磷对芋头生长有明显的促进作用。 相似文献
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