Tipburn Severity and Calcium Distribution in Lisianthus (Eustoma Grandiflorum (Raf.) Shinn.) Cultivars under Different Relative Air Humidity Conditions
Tipburn Severity and Calcium Distribution in Lisianthus (Eustoma Grandiflorum (Raf.) Shinn.) Cultivars under Different Relative Air Humidity Conditions
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DOI：
10.3390/agronomy8100218
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发表时间：
2018-10-01
期刊：
影响因子：
3.7
通讯作者：
Watanabe, Hitoshi
中科院分区：
文献类型：
--
作者：
Kuronuma, Takanori;Watanabe, Yua;Watanabe, Hitoshi
摘要香樟（Eustoma grandiflorum（Raf.）Shinn.）个品种空气相对湿度被认为是影响经济作物尖烧病严重程度的关键环境因子。然而，有有限的研究比较了不同的空气相对湿度条件下的香烛品种的发生和钙（Ca）的分布。因此，我们研究了空气相对湿度对7个洋桔梗品种的尖烧严重程度，蒸腾速率和钙含量的影响。在高湿度处理（70%）下，只有两个品种（“Voyage pink”（VP）和“Azuma-no-kaori”（AK））的烧尖严重程度显着高于低湿度处理（50%），这表明高湿度条件并不总是增加洋桔梗烧尖的严重程度。所有品种的蒸腾速率，除了AK，要么显着低于高湿度处理下比低湿度处理，或没有显着变化的处理之间。相反，除“短笛雪”（PS）外，所有品种的总钙含量在高湿处理下均显著高于低湿处理。这些结果表明，钙的收购和分配在洋桔梗品种的强烈影响，从根压钙吸收。
Tipburn is a major problem for the production of lisianthus (Eustoma grandiflorum (Raf.) Shinn.) cultivars. Relative air humidity is regarded as a key environmental factor affecting tipburn severity in commercial crops. However, there are limited studies comparing the occurrence of tipburn and calcium (Ca) distribution in lisianthus cultivars under different relative air humidity conditions. Accordingly, we investigated the effect of relative air humidity on tipburn severity, transpiration rate, and Ca content in seven lisianthus cultivars. Under a high humidity treatment (70%), only two cultivars ("Voyage pink" (VP) and "Azuma-no-kaori" (AK)) showed significantly higher tipburn severity than those under a low humidity treatment (50%), which suggests that high humidity conditions do not always increase tipburn severity in lisianthus. Transpiration rates of all cultivars, except for AK, were either significantly lower under the high humidity treatment than under the low humidity treatment, or did not vary significantly between the treatments. In contrast, total Ca concentrations in all cultivars, except for "Piccolosa snow" (PS), were significantly higher under the high humidity treatment than under the low humidity treatment. These results suggest that Ca acquisition and distribution in lisianthus cultivars are strongly influenced by Ca uptake from root pressure.