期刊
NEMATOLOGY
卷 14, 期 -, 页码 309-320出版社
BRILL
DOI: 10.1163/156854111X612306
关键词
motility; root-knot nematode; semiochemicals; stylet thrusting
类别
资金
- UK-India Education and Research Initiative (UKIERI)
- Biotechnology and Biological Sciences Research Council
- British Council
- Indian Council of Agricultural Research
- BBSRC [BBS/E/C/00004937, BBS/E/C/00005194, BBS/E/C/00004963] Funding Source: UKRI
Plant chemicals in the rhizosphere originating from root exudates or sites of previous nematode penetration can influence nematode behaviour, and a number of plant compounds, some present in root exudates, have been shown either to attract nematodes to the roots, or to result in repellence, motility inhibition, or even death. The present work was conducted to isolate small lipophilic molecules (SLMs) emitted by root exudates of Solanum lycopersicum and Oryza sativa to investigate their effect on root-knot nematodes. SLMs extracted, through solid phase extraction, from hydroponically collected root exudates of 40 tomato and rice plants had an inhibitory impact on the motility of second-stage juveniles of Meloidogyne incognita and M. graminicola and showed a nematotoxic or nematostatic (upon dilution) effect on both species. The semiochemicals present in the SLMs induced a very small, albeit statistically significant, effect on stylet thrusting. A small quantity of salivary secretion around the stylet tip and a significant decrease in nematode head movement were observed. The semiochemicals negatively influenced behaviour of M. incognita and M. graminicola by strongly affecting their mobility. Therefore, it is proposed that SLMs present in both tomato and rice root exudates play important roles during the interaction of Meloidogyne spp. with their host plant, and that they might exert a repellent, or allellopathic, effect on these nematodes.
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