Effects of low magnesium and an arbuscular mycorrhizal fungus on the growth, magnesium distribution and photosynthesis of two citrus cultivars

Effects of low magnesium and an arbuscular mycorrhizal fungus on the growth, magnesium distribution and photosynthesis of two citrus cultivars
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低镁和丛枝菌根真菌对两个柑橘品种生长、镁分配和光合作用的影响

DOI:
10.1016/j.scienta.2014.07.016
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发表时间:
2014-10
影响因子:
4.3
通讯作者:
肖家欣
肖家欣
中科院分区:
农林科学2区
文献类型:
--
作者:
肖家欣

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研究了丛枝菌根真菌Glomus versiforme对纽荷尔(Citrus sinensisOsbeck cv.纽荷尔)脐橙橙子和'Ponkan'(Citrus reticulateBlanco cv.以枳(Poncirus trifoliataL.)Raf.)在盆栽条件下研究了富镁和贫镁条件下的生长情况。低镁土壤对‘纽荷尔’幼苗生长的抑制作用大于‘<$坎’。这是伴随着更大的镁浓度和CO2同化率在基叶下降,和较低的可溶性糖浓度在根中的'纽荷尔'。接种AM真菌能促进两个品种的生长,提高植株各部位的镁浓度,促进光合作用,尤其是对缺镁条件下的‘纽荷尔’幼苗。这些结果表明G.在温室低镁土壤中,versiforme具有促进‘Newhall’幼苗生长和镁分配的潜力。
The effects of the arbuscular mycorrhizal (AM) fungus,Glomus versiforme, on plant growth, magnesium (Mg) concentration and distribution, and photosynthesis in the ‘Newhall’ (Citrus sinensisOsbeck cv. Newhall) navel orange and ‘Ponkan’ (Citrus reticulateBlanco cv. Ponkan) tangerine grafted on the rootstock trifoliate orange (Poncirus trifoliataL. Raf.) were studied in potted cultures under Mg-poor and Mg-rich conditions. The low soil Mg inhibited the ‘Newhall’ seedlings growth more than that of ‘Ponkan’. This was accompanied by greater decreases of Mg concentrations and CO2assimilation rate in the basal leaves, and lower soluble sugar concentrations in the roots of ‘Newhall’. AM inoculation improved the growth, the Mg concentrations in various plant parts, and the photosynthesis of the two cultivars, especially the ‘Newhall’ seedlings under the Mg-poor condition. These results suggest thatG. versiformehas the potential to enhance growth and Mg distribution in ‘Newhall’ seedlings grown in low Mg soil in a greenhouse.
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