CEBAS-CSIC, Department of Soil and Water Conservation and Organic Waste Management, Murcia, Spain.
Phytochemistry. 2011 Feb;72(2-3):223-9. doi: 10.1016/j.phytochem.2010.11.008. Epub 2010 Dec 7.
Arbuscular mycorrhizal fungi (AMF) and Trichoderma harzianum are known to affect plant growth and disease resistance through interaction with phytohormone synthesis or transport in the plant. Cross-talk between these microorganisms and their host plants normally occurs in nature and may affect plant resistance. Simultaneous quantification in the shoots of melon plants revealed significant changes in the levels of several hormones in response to inoculation with T. harzianum and two different AMF (Glomus intraradices and Glomus mosseae). Analysis of zeatin (Ze), indole-3-acetic acid (IAA), 1-aminocyclopropane-1-carboxylic acid (ACC), salicylic acid (SA), jasmonic acid (JA) and abscisic acid (ABA) in the shoot showed common and divergent responses of melon plants to G. intraradices and G. mosseae. T. harzianum effected systemic increases in Ze, IAA, ACC, SA, JA and ABA. The interaction of T. harzianum and the AMF with the plant produced a characteristic hormonal profile, which differed from that produced by inoculation with each microorganism singly, suggesting an attenuation of the plant response, related to the hormones SA, JA and ethylene. These results are discussed in relation to their involvement in biomass allocation and basal resistance against Fusarium wilt.
丛枝菌根真菌 (AMF) 和哈茨木霉已知通过与植物中植物激素的合成或运输相互作用来影响植物生长和抗病性。这些微生物与其宿主植物之间的串扰通常在自然界中发生，并可能影响植物的抗性。同时在甜瓜植株的地上部分定量检测发现，接种哈茨木霉和两种不同的丛枝菌根真菌（球囊霉和摩西球囊霉）后，几种激素的水平发生了显著变化。对玉米素（Ze）、吲哚-3-乙酸（IAA）、1-氨基环丙烷-1-羧酸（ACC）、水杨酸（SA）、茉莉酸（JA）和脱落酸（ABA）的分析表明，甜瓜植株对球囊霉和摩西球囊霉的共同和不同的反应。哈茨木霉对 Ze、IAA、ACC、SA、JA 和 ABA 具有全身性的增加作用。哈茨木霉和 AMF 与植物的相互作用产生了一种特征性的激素谱，与单独接种每种微生物的激素谱不同，这表明植物的反应受到抑制，与激素 SA、JA 和乙烯有关。这些结果与它们在生物量分配和对枯萎病的基础抗性中的作用有关。
