Impact of insect root herbivory on the growth and nitrogen and carbon contents of white clover (Trifolium repens) seedlings
Impact of insect root herbivory on the growth and nitrogen and carbon contents of white clover (Trifolium repens) seedlings
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DOI：
10.1139/b96-192
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发表时间：
1996-10-01
期刊：
影响因子：
--
通讯作者：
Cliquet, JB
中科院分区：
文献类型：
--
作者：
Murray, PJ;Hatch, DJ;Cliquet, JB
研究了象鼻虫 Sitona flavescens (Marsh.) 幼虫食根对白三叶草 (Trifolium repens L.) 幼苗生长和碳氮经济的影响，以及根际根系分泌物中含氮化合物的性质和程度。这些幼苗在微量渗漏仪系统的沙培养中生长，该系统能够对根系分泌物进行连续采样。象鼻虫侵染显着降低了叶片生物量以及总氮和碳含量，并损害了固氮。与未受侵染幼苗相比，受侵染植株的C:N比显着增加。渗出液中最丰富的氨基酸是天冬氨酸和丝氨酸。
The impact of root herbivory by larvae of the weevil Sitona flavescens (Marsh.) on the growth and carbon and nitrogen economies of seedlings of white clover (Trifolium repens L.) and the nature and extent of nitrogenous compounds found in the root exudates taken from the rhizosphere were investigated. The seedlings were grown in sand culture in a system of microlysimeters that enabled sequential sampling of root exudates. Weevil infestation significantly reduced foliar biomass and total N and C contents and impaired N-fixation. The C:N ratios of the infested plants were significantly increased compared with those of uninfested seedlings. The most abundant amino acids in the exudates were aspartic acid and serine.