Calcium forms in leaves of muskmelon plants grown with different calcium compounds
Calcium forms in leaves of muskmelon plants grown with different calcium compounds
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DOI：
10.1080/01904169809365531
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发表时间：
1998-01-01
影响因子：
2.1
通讯作者：
Molina, E
中科院分区：
文献类型：
--
作者：
Alarcón, AL;Madrid, R;Molina, E
研究了不同钙形态（可溶性、结合性、无机不溶性和有机不溶性）在黄瓜成熟叶和幼叶生长过程中的时间变化趋势。不利钙吸收条件下岩棉上栽培的再生植物。测试了伴随Ca的阴离子：NO3-作为对照，EDTA（2-）、Cl-和SO42-两种浓度水平分别相当于对照Ca水平的一半和四分之一。所有形态的成熟叶和幼叶之间的差异都非常明显。一般来说，成熟叶片中无机不溶性钙含量最高，结合态钙含量最低。另一方面，在幼叶中，可溶性钙通常是主要形式，而有机不溶性钙含量最少。Cg-EDTA处理（Ch-1/2和Ch-1/4）的叶片Ca浓度低于其他处理。6个缺钙处理的成熟叶/幼叶Ca含量比值分别为5.0 ~ 18.5（可溶性Ca）、3.8 ~ 11.0（结合Ca）、9.0 ~ 41.7（无机不溶性Ca）和9.0 ~ 47.7（有机不溶性Ca）。作为对照，这些比值分别为2.3（可溶性钙）、1.6（结合钙）、22.3（无机不溶性钙）和61.5（有机不溶性钙）。不溶态总有较高的比例。在所有处理和采样日期中，成熟叶片的总Ca水平大约是幼叶的10倍，并且始终遵循以下顺序：NO->Cl- 1/2（类似于）SO(4)(2-)-1/2>Cl- 1/4（类似于）SO(4)(2-)-1/4>Ch-1/2>Ch-1/4，这与果实和营养生物量生产所反映的响应中观察到的顺序相同。
The time course trend of the various calcium (Ca) forms (soluble, bound, inorganic insoluble, and organic insoluble) was studied throughout the growing period in mature and young leaves of Cucumis melo L. cv. Revigal plants cultivated on rockwool under unfavorable conditions for Ca uptake. The following anions accompanying Ca were tested: NO3- as control, as well as EDTA(2-), Cl- and SO42- with two concentration levels equivalent to half and a quarter part of the Ca level of the control. The differences between mature and young leaves were very marked for all the forms. Generally, the inorganic insoluble Ca form was predominant in mature leaves, while the bound form showed the lowest levels. In young leaves, on the other hand, soluble Ca was usually the major form, whereas organic insoluble Ca was the least plentiful. The treatments with Cg-EDTA (Ch-1/2 and Ch-1/4) resulted in lower leaf Ca concentration than the other treatments. The ratios referring to the Ca contents of mature leaves/young leaves for the six Ca-deficiency treatments varied from 5.0 to 18.5 (soluble Ca), 3.8 to 11.0 (bound Ca), 9.0 to 41.7 (inorganic insoluble Ca), and 9.0 to 47.7 (organic insoluble Ca). For the control, these ratios were 2.3 (soluble Ca), 1.6 (bound Ca), 22.3 (inorganic insoluble Ca), and 61.5 (organic insoluble Ca). The insoluble forms always showed higher ratios. For all treatments and sampling dates the total Ca level was approximately ten times higher in mature leaves than in young leaves and always in the following order: NO->Cl--1/2(similar to)SO(4)(2-)-1/2>Cl--1/4(similar to)SO(4)(2-)-1/4>Ch-1/2>Ch-1/4, Which was the same order observed in the response as reflected by fruit and vegetative biomass production.