Quantitative relation between chlorophyll and iron in green and chlorotic pear leaves
Quantitative relation between chlorophyll and iron in green and chlorotic pear leaves
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DOI：
10.1104/pp.8.3.449
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发表时间：
1933-07-01
期刊：
影响因子：
7.4
通讯作者：
Oserkowsky, J
中科院分区：
文献类型：
--
作者：
Oserkowsky, J
褪色梨叶的铁含量可能与同龄、同一树上的绿叶一样多或更多，无论铁含量是按鲜重还是干重表示；但生长在无缺绿区的树木绿叶中的铁含量高于缺绿区树木的绿叶或黄叶。石灰引起的失绿仅限于在最初 2 或 3 个月内铁含量较低的叶子。的生长季节。 amt 之间不存在相关性。用水或 0.05N HCl 从干梨叶中提取的铁含量以及叶子的叶绿素含量。叶子中只有部分铁，即活性铁，对叶绿素的形成有效。描述了一种估计叶子中活性铁的方法，该方法基于这样的假设：干燥叶子的 1.0N HCl 提取物中含有活性铁或其衍生物。褪绿植物的梨、桃、杏叶的叶绿素含量与叶绿素含量成正比。叶子中的活性铁。在叶绿素形成中具有活性的化合物的 Fe 以离子 Fe 的形式存在于 1.0N HCl 提取物中，或者存在于容易产生离子 Fe 的化合物中。不同组的叶片中叶绿素/活性铁的比值差异很大；因此，活性铁在叶子中并不以与叶绿素的化学计量组合存在，如果它与叶绿素结合的话。
Chlorotic pear leaves may contain as much or more Fe than green leaves of the same age and on the same trees, regardless of whether the Fe content is expressed on the fresh-weight or the dry-weight basis; but the Fe content of green leaves from trees grown in districts free from chlorosis is higher than that of either green or yellow leaves from chlorotic trees. Lime-induced chlorosis is confined to leaves in which the Fe content is low during the first 2 or 3 mos. of the growing season. No correlation exists between the amt. of Fe extracted from dry pear leaves with water or with 0.05N HCl and the chlorophyll content of leaves. Only part of the Fe in leaves, the active Fe, is effective in chlorophyll formation. A method is described for the estimation of the active Fe in ieaves, which is based on the assumption that it, or its derivative, is contained in the 1.0N HC1 extract of dried leaves. The chlorophyll content of pear, peach, and apricot leaves from chlorotic plants was proportional to the amt. of active Fe in the leaves. The Fe of the compound active in chlorophyll formation is present in the 1.0N HCl extract as ionic Fe or in a compound which readily yields ionic Fe. The values of the ratio chlorophyll/active Fe in leaves varies widely in different sets of leaves; hence, the active Fe is not present in leaves in a stoichiometrical combination with chlorophyll, if it is combined with it at all.