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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >Orange varieties as interstocks increase the salt tolerance of lemon trees.
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Orange varieties as interstocks increase the salt tolerance of lemon trees.

机译：中间品种的橙色品种增加了柠檬树的耐盐性。

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摘要

We investigated the ability of interstocks to increase salt tolerance in lemon trees. We compared 2-year-old 'Verna' lemon trees [Citrus limon (L.) Burm.; VL] grafted on Sour Orange (C. aurantium L.; SO) rootstock either without an interstock (VL/SO), or interstocked with 'Valencia' orange (C. sinensis Osbeck;VL/V/SO), or with 'Castellano' orange (C. sinensis Osbeck; VL/C/SO). Trees were grown under greenhouse conditions and supplied with nutrient solutions containing 0, 30, or 60 mM NaCl. Reductions in leaf growth caused by salt treatment were greatest in non-interstocked (VL/SO) trees, followed by VL/C/SO trees, and were the least in VL/V/SO trees. Although the levels of Cl- and Na+ ions in the roots and stems were not affected by either interstock, leaf concentrations of Cl- and Na+ were higher in VL/SO trees than in VL/C/SO or VL/V/SO trees, suggesting that an interstock in Citrus trees could limit the uptake and transport of such ions to the shoots. Saline-treated VL/SO trees also tended to have the lowest shoot:root (S:R) ratios; so, overall, there was a negative relationship between S:R ratio and leaf Cl- ion concentration. Leaf transpiration (Eleaf) may also be involved in the reduction in leaf Cl- concentration, as interstocked trees had lower Eleaf values at mid-day than non-interstocked trees. Salinity increased leaf concentrations of Ca2+ in VL/C/SO trees and increased both leaf K+ and N concentrations in all trees, regardless of interstock. Salinity reduced leaf water potentials and osmotic potentials, such that leaf turgor was increased in all trees.
机译：我们调查了中间种群增加柠檬树耐盐性的能力。我们比较了2岁的'Verna'柠檬树[Citrus limon （L.）Burm .; VL]嫁接到酸橙（ C。aurantium L .; SO）砧木上，无中间砧木（VL / SO），或与'巴伦西亚'橙（C. sinensis 奥斯贝克（Osbeck; VL / V / SO），或配以“ Castellano”橙（ C。sinensis 奥斯贝克（VL / C / SO）”。树木在温室条件下生长，并提供含有0、30或60 mM NaCl的营养液。在非间断（VL / SO）树木中，盐处理导致的叶片生长减少最大，其次是VL / C / SO树木，而在VL / V / SO树木中最小。尽管根际和茎中Cl -和Na + 离子的水平均不受中间砧的影响，但Cl -和Na的叶片浓度VL / SO树中的 + 高于VL / C / SO或VL / V / SO树中的 + ，这表明柑橘树中的中间种群可能会限制其吸收和运输这样的离子。盐水处理的VL / SO树也往往具有最低的苗：根（S：R）比。因此，总体而言，S：R比与叶片Cl -离子浓度之间存在负相关关系。叶片蒸腾作用（E leaf ）也可能参与了叶片Cl -浓度的降低，因为中间种群的树木中叶的E leaf 值较低。天要比非交错树。盐度增加了VL / C / SO树木中Ca 2 + 的叶片浓度，并增加了所有树木中叶片K + 和N的浓度，而与中间种无关。盐度降低了叶片的水势和渗透势，从而使所有树木的叶片膨大增加。

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