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首页> 外文期刊>Journal of Experimental Botany >Nutrient deficiencies modify the ionomic composition of plant tissues: a focus on cross-talk between molybdenum and other nutrients in Brassica napus
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Nutrient deficiencies modify the ionomic composition of plant tissues: a focus on cross-talk between molybdenum and other nutrients in Brassica napus

机译：营养不足会改变植物组织的蛋白质组学组成：着眼于钼与甘蓝型油菜中其他养分之间的串扰

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摘要

The composition of the ionome is closely linked to a plant's nutritional status. Under certain deficiencies, cross-talk induces unavoidable accumulation of some nutrients, which upsets the balance and modifies the ionomic composition of plant tissues. Rapeseed plants (Brassica napus L.) grown under controlled conditions were subject to individual nutrient deficiencies (N, K, P, Ca, S, Mg, Fe, Cu, Zn, Mn, Mo, or B) and analyzed by inductively high-resolution coupled plasma mass spectrometry to determine the impact of deprivation on the plant ionome. Eighteen situations of increased uptake under mineral nutrient deficiency were identified, some of which have already been described (K and Na, S and Mo, Fe, Zn and Cu). Additionally, as Mo uptake was strongly increased under S, Fe, Cu, Zn, Mn, or B deprivation, the mechanisms underlying the accumulation of Mo in these deficient plants were investigated. The results suggest that it could be the consequence of multiple metabolic disturbances, namely: (i) a direct disturbance of Mo metabolism leading to an up-regulation of Mo transporters such as MOT1, as found under Zn or Cu deficiency, which are nutrients required for synthesis of the Mo cofactor; and (ii) a disturbance of S metabolism leading to an up-regulation of root SO42- transporters, causing an indirect increase in the uptake of Mo in S, Fe, Mn, and B deficient plants.
机译：离子组的组成与植物的营养状况密切相关。在某些缺陷下，串扰会不可避免地引起一些养分积累，从而破坏平衡并改变植物组织的蛋白质组学组成。在受控条件下生长的油菜籽植物（Brassica napus L.）面临个别的营养缺乏症（N，K，P，Ca，S，Mg，Fe，Cu，Zn，Mn，Mo或B），并通过感应高-分辨率耦合等离子体质谱法测定剥夺对植物离子组的影响。鉴定了十八种在矿质营养缺乏的情况下摄取增加的情况，其中一些已经被描述（钾和钠，硫和钼，铁，锌和铜）。此外，由于在S，Fe，Cu，Zn，Mn或B剥夺下Mo吸收显着增加，因此研究了Mo在这些不足植物中积累的机理。结果表明，这可能是多种代谢紊乱的结果，即：（i）钼代谢的直接紊乱导致钼转运蛋白（如MOT1）的上调，如锌或铜缺乏，这是必需的养分用于合成钼辅因子; （ii）S代谢紊乱导致根系SO42转运蛋白的上调，从而导致S，Fe，Mn和B缺乏植物中Mo的吸收间接增加。

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