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Potato aphid Macrosiphum euphorbiae performance is determined by aphid genotype and not mycorrhizal fungi or water availability 被引量:4
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作者 Alison Jane Karley Matthew Emslie-Smith Alison Elizabeth Bennett 《Insect Science》 SCIE CAS CSCD 2017年第6期1015-1024,共10页
Intra- and interspecific variation in plant and insect traits can alter the strength and direction of insect-plant interactions, with outcomes modified by soil biotic and abiotic conditions. We used the potato aphid ... Intra- and interspecific variation in plant and insect traits can alter the strength and direction of insect-plant interactions, with outcomes modified by soil biotic and abiotic conditions. We used the potato aphid (Macrosiphum euphorbiae Thomas) feeding on cultivated Solanum tuberosum and wild Solanurn berthaulti to study the impact of water availability and plant mutualistic arbuscular mycorrhizal (AM) fungi on aphid performance and susceptibility to a parasitoid wasp (Aphidius ervi Haliday). Plants were grown under glass with live or sterile AM fungal spores and supplied with sufficient or reduced water supply. Plants were infested with 1 of 3 genotypes ofM. euphorbiae or maintained as aphidfree controls; aphid abundance was scored after 1 week, after which aphid susceptibility to A. ervi was assayed explanta. Solarium tuberosum accumulated c. 20% more dry mass than S. berthaultii, and root mass of S. berthaultii was smallest under reduced water supply in the presence of AM fungi. Aphid abundance was lowest on S. berthaultii and highest for genotype "2" aphids; genotype "1" aphid density was particularly reduced on S. berthaultii. Aphid genotype "1" exhibited low susceptibility to parasitism and was attacked less frequently than the other two more susceptible aphid genotypes. Neither AM fungi nor water availability affected insect performance. Our study suggests a fitness trade-offin M. euphorbiae between parasitism resistance and aphid performance on poor quality Solarium hosts that warrants further exploration, and indicates the importance of accounting for genotype identity in determining the outcome of multitrophic interactions. 展开更多
关键词 Aphidius ervi arbuscular mycorrhizal fungi multitrophic interaction parasitism resistance solanum spp.
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茄属杂草秸秆对树番茄苗生长及养分吸收的影响
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作者 代京桐 王江月 +5 位作者 李睿 程琪 王华 邓丽丽 林立金 胡容平 《湖北农业科学》 2023年第7期84-88,共5页
为探究不同茄属杂草秸秆对果树生长及养分吸收的影响,通过盆栽试验,研究了4种茄属杂草龙葵(Solanum nigrum)、黄果龙葵(Solanum diphyllum)、红果龙葵(Solanum alatum)和矮株龙葵(Solanum nigrum var.humile)秸秆对树番茄(Cyphomandra b... 为探究不同茄属杂草秸秆对果树生长及养分吸收的影响,通过盆栽试验,研究了4种茄属杂草龙葵(Solanum nigrum)、黄果龙葵(Solanum diphyllum)、红果龙葵(Solanum alatum)和矮株龙葵(Solanum nigrum var.humile)秸秆对树番茄(Cyphomandra betacea)幼苗生长及养分吸收的影响。结果表明,矮株龙葵秸秆和龙葵秸秆处理在一定程度上增加了树番茄幼苗的生物量及光合色素(叶绿素a、叶绿素b、叶绿素总量和类胡萝卜素)含量,其余2种秸秆处理的影响不显著。黄果龙葵秸秆和龙葵秸秆处理提高了树番茄幼苗的超氧化物歧化酶活性,其余2种秸秆处理的影响则起降低的作用。4种茄属杂草秸秆处理对树番茄幼苗的过氧化物酶活性、过氧化氢酶活性和可溶性蛋白含量的影响不显著或起降低的作用。黄果龙葵秸杆处理提高了树番茄幼苗的全氮、全磷和全钾含量,其余3种秸秆处理的影响不显著或在一定程度上起降低的作用。 展开更多
关键词 树番茄(Cyphomandra betacea) 茄属杂草秸秆 生长 养分吸收
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