Applying foliar magnesium enhances wheat growth in acidic soil by stimulating exudation of malate and citrate

نویسندگان

چکیده

Aluminium toxicity in acidic soils adversely affects wheat growth. Foliar-applied magnesium (Mg) contributes to mitigating soil acidity stress wheat, but the mechanisms are unknown. This study explored mechanism of foliar-Mg mediated enhancement growth soil. Two contrasting near-isogenic (Triticum aestivum L.) genotypes differing Al resistance (Al-sensitive ES8 and Al-resistant ET8) were grown vegetative stage (Zadoks 24) a reconstituted (pH0.1 M CaCl2 4.0) profile with three rates foliar Mg (0, 200 500 mg L? 1 using MgSO4.7H2O). Magnesium was applied foliage twice [14 28 days after sowing (DAS)], plant root exuded carboxylates measured up 42 DAS. Applying increased organic acid anion exudation from roots by ~ 2-fold compared 0 treated plants. The genotype 1.3-fold more malate citrate than Al-sensitive absence Mg. Malate delayed relative following application. foliar-applied shoot dry weight (by 38 %), total length 33 %) intrinsic water-use efficiency 80 plants no decreased (as shown significant increase chlorophyll fluorescence Fv/Fm ratio) Increased is underlying enhanced application under conditions.

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ژورنال

عنوان ژورنال: Plant and Soil

سال: 2021

ISSN: ['0032-079X', '1573-5036']

DOI: https://doi.org/10.1007/s11104-021-04984-z