Wu, Qiang-Sheng published the artcileMycorrhizas enhance drought tolerance of citrus by altering root fatty acid compositions and their saturation levels, Recommanded Product: Methyl decanoate, the main research area is mycorrhiza drought citrus root fatty acid saturation; Poncirus trifoliata ; drought; mycorrhizal symbiosis; unsaturation index of fatty acids.
Arbuscular mycorrhizas (AMs) have the ability to enhance drought tolerance of citrus, but the underlying mechanisms have not been clearly elucidated. Considering the strong association of cell membrane fatty acid (FA) unsaturation with plant drought tolerance, the present study hypothesized that AM fungi (AMF) modulated the composition and unsaturation of FAs to enhance drought tolerance of host plants. Drought-sensitive citrus rootstocks, trifoliate orange (Poncirus trifoliata) seedlings, were inoculated with AMF (Funneliformis mosseae) for 3 mo and were subsequently exposed to drought stress (DS) for 8 wk. Mycorrhizal seedlings exhibited better plant growth performance, higher leaf water potential and lower root abscisic acid concentrations under both well-watered (WW) and DS conditions. Arbuscular mycorrhiza fungus inoculation considerably increased root Me oleate (C18:1), Me linoleate (C18:2) and Me linolenate (C18:3N3) concentrations under both WW and DS conditions, and root Me palmitoleate (C16:1) concentrations under WW, while it decreased root Me stearate (C18:0) levels under both WW and DS. These changes in the composition of FAs of mycorrhized roots resulted in higher unsaturation index of root FAs, which later aided in reducing the oxidative damage on account of lower concentration of malondialdehyde and superoxide radicals. The changes of these FAs were a result of AMF-up-regulating root FA desaturase 2 (PtFAD2), FA desaturase 6 (PtFAD6) and Δ9 FA desaturase (PtΔ9) genes under WW and PtFAD2, PtFAD6 and Δ15 FA desaturase (PtΔ15) genes under DS conditions. Our results confirmed that mycorrhization brought significant changes in root FA compositions, in addition to regulation of gene expression responsible for increasing the unsaturation level of FAs, a predisposing physiol. event for better drought tolerance of citrus.
Tree Physiology (Oxford, United Kingdom) published new progress about Citrus. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Recommanded Product: Methyl decanoate.
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