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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Hormones induce an Fe-deficiency-like root epidermal cell pattern in the Fe-inefficient tomato mutant fer
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Hormones induce an Fe-deficiency-like root epidermal cell pattern in the Fe-inefficient tomato mutant fer

机译：激素在铁效率低的番茄突变体中诱导出铁缺乏型根表皮细胞模式

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The tomato mutant fer (Lycopersion esculentum L. T3238fer) displayed a chlorotic phenotype at normal external Fe levels Root cells of the mutant are incompetent to take up iron in adequate amounts and are incapable to induce any of the known responses to Fe deficiency stress. We report here that the ethylene precursor 1-aminocyclopropane-1-carboxylic acid and the auxin analog 2,4-dichlorophenoxyacetic acid induce the formation of extra root hairs and transfer cells in the epidermis, thus mimicking the root-morphological Fe stress responses. In contrast, the: physiological reactions involved in iron acquisition are not affected by the hormone treatment. These results indicate that ethylene is essential for transducing environmental signals into adaptive changes in root morphology. The data further suggest that the mutation does not affect necessary steps in the differentiation processes of epidermal cells. The FER gene appears to control sensing of iron levels and/or the regulation of mechanisms involved in iron uptake. [References: 22]
机译：番茄突变体fer（Lycopersion esculentum L. T3238fer）在正常的外部Fe水平下表现出褪绿的表型。突变体的根细胞不能吸收足够量的铁，并且无法诱导任何已知的对Fe缺乏胁迫的反应。我们在这里报告乙烯前体1-氨基环丙烷-1-羧酸和植物生长素类似物2,4-二氯苯氧基乙酸诱导表皮中多余的根毛形成和转移细胞，从而模拟了根系形态的铁胁迫响应。相反，荷铁过程中所涉及的生理反应不受激素治疗的影响。这些结果表明乙烯对于将环境信号转换成根形态的适应性变化至关重要。数据进一步表明，该突变不影响表皮细胞分化过程中的必要步骤。 FER基因似乎可以控制铁水平的感应和/或调节铁摄取的机制。 [参考：22]

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