Increasing phosphorus supply is not the mechanism by which arbuscular mycorrhiza increase attractiveness of bean (Vicia faba) to aphids.
Increasing phosphorus supply is not the mechanism by which arbuscular mycorrhiza increase attractiveness of bean (Vicia faba) to aphids.
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DOI：
10.1093/jxb/eru283
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发表时间：
2014-10
影响因子：
6.9
通讯作者：
Johnson D
中科院分区：
文献类型：
--
作者：
Babikova Z;Gilbert L;Randall KC;Bruce TJ;Pickett JA;Johnson D
增加磷供应并不是丛枝菌根增加蚕豆对蚜虫吸引力的机制。丛枝菌根真菌（AM）是重要的植物共生菌，为植物提供磷(P)等营养物质以换取碳。AM真菌还通过影响蚜虫寄主位置植物挥发物的排放来增强植物对蚜虫的吸引力。我们在一个多因子设计中，通过操纵P和AM真菌对蚕豆（Vicia faba L.）的有效性，测试了植物对P的吸收增加是否是AM真菌改变植物挥发性特征和蚜虫行为反应的机制。如果AM真菌仅通过增加P的获取来影响植物挥发物，我们预测菌根豆的挥发物排放量和对蚜虫的吸引力与提供额外P的非菌根豆相似，AM真菌和P添加分别使叶片P浓度增加40%和24%。与磷添加量无关，菌根植物的萘产量较少。相比之下，AM真菌定殖的植物中(S)-芳樟醇、(E)-石竹烯和(R)-烯丙烯D的产量较少，但只有在不添加P的情况下才会如此。AM真菌对植物对豌豆蚜虫（Acyrthosiphon pisum Harris）的吸引力有正向影响，且与根系定植程度相关；但其吸引力不受磷处理的影响，也与叶片磷浓度无关。这些发现表明，增加磷的吸收并不是菌根增加植物对蚜虫吸引力的主要机制。相反，该机制可能是通过AM真菌诱导的植物系统信号传导来运作的。
Increasing phosphorus supply is not the mechanism by which arbuscular mycorrhiza increase attractiveness of bean, Vicia faba, to aphids. Arbuscular mycorrhizal (AM) fungi, important plant mutualists, provide plants with nutrients such as phosphorus (P) in return for carbon. AM fungi also enhance the attractiveness of plants to aphids via effects on emissions of plant volatiles used in aphid host location. We tested whether increased P uptake by plants is the mechanism through which AM fungi alter the volatile profile of plants and aphid behavioural responses by manipulating the availability of P and AM fungi to broad beans (Vicia faba L.) in a multi-factorial design. If AM fungi affect plant volatiles only via increased P acquisition, we predicted that the emission of volatiles and the attractiveness of mycorrhizal beans to aphids would be similar to those of non-mycorrhizal beans supplied with additional P. AM fungi and P addition increased leaf P concentrations by 40 and 24%, respectively. The production of naphthalene was less in mycorrhizal plants, regardless of P addition. By contrast, production of (S)-linalool, (E)-caryophyllene and (R)-germacrene D was less in plants colonized by AM fungi but only in the absence of P additions. The attractiveness of plants to pea aphids (Acyrthosiphon pisum Harris) was positively affected by AM fungi and correlated with the extent of root colonization; however, attractiveness was neither affected by P treatment nor correlated with leaf P concentration. These findings suggest that increased P uptake is not the main mechanism by which mycorrhiza increase the attractiveness of plants to aphids. Instead, the mechanism is likely to operate via AM fungi-induced plant systemic signalling.
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影响因子：
2.2
作者：
Guerrieri, E;Lingua, G;Berta, G
通讯作者：
Berta, G
影响因子：
2.7
作者：
Gange, AC;Bower, E;Brown, VK
通讯作者：
Brown, VK
影响因子：
--
作者：
Babikova Z;Johnson D;Bruce T;Pickett JA;Gilbert L
通讯作者：
Gilbert L
DOI：
10.1111/nph.12169
发表时间：
2013-04
期刊：
The New phytologist
影响因子：
--
作者：
Gosling P;Mead A;Proctor M;Hammond JP;Bending GD
通讯作者：
Bending GD
影响因子：
2.3
作者：
GERSHENZON, J
通讯作者：
GERSHENZON, J