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首页> 外文期刊>Acta Horticulturae >Estimation of introduced apricot cultivars drought resistance by the intensity of leaf chlorophyll fluorescence
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Estimation of introduced apricot cultivars drought resistance by the intensity of leaf chlorophyll fluorescence

机译：叶片叶绿素荧光强度引入的杏品种抗旱性估算

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摘要

In the conditions of the south of Russia in July-August, there is often a lack of moisture, which negatively affects important physiological processes that provide formation of the apricot fruit crop. The aim of the research was to study the fluorescence intensity of apricot leaf chlorophyll in the process of dehydration and to select the cultivars characterized with high drought resistance. In the experiment, leaves of four apricot cultivars were included: 'Kryimskij Amur' (control), 'Budapest', Mindalnij' and 'Hong Iu'. Chlorophyll fluorescence was measured by a portable fluorometer "Floratest". The studies were carried out in the second decade of August 2015-2016. Initial fluorescence levels after irradiation (F0), maximum (Fm) and stationary (Fst) values after the light adaptation were recorded. Short dehydration (4 h) resulted in an increase of the fluorescence parameters. Long-term dehydration (24 h) caused a significant decrease of all the studied indexes. The lowest values were observed in'Kryimskij Amur' (control) that demonstrated its lowest drought resistance in comparison with other studied cultivars. After a long wilting, leaf turgor in this cultivar restored poorly (7.5-64.5%). It was revealed a correlation (0.4-0.8) between the calculated fluorescence parameters and the total water content in the leaves. 'Budapest* was characterized by a slow loss of moisture and due to this high (32-81.4%) restoration of leaf turgor after 24 h wilting. However, indexes of leaf chlorophyll fluorescence hardly regenerated after a long wilting. In 'Mindalnij' leaf turgor was restored more slowly after a long wilting (7-62.4%), but it was characterized with high photosynthetic activity at low water content. 'Hong Iu' demonstrated high values of fluorescence process regeneration, as well as leaf turgor restoration. It was characterized with a high potential and is promising for the regions with insufficient water supply, as well as for use in breeding for drought resistance.
机译：在俄罗斯南部的八月南部的条件下，往往存在缺乏水分，这对重要的生理过程产生负面影响，这些过程提供了杏果作物的形成。该研究的目的是研究乳腺叶片在脱水过程中的荧光强度，并选择具有高抗旱性的品种。在实验中，包括四个杏品种的叶子：'Kryimskij Amur'（Control），'Budapest'，Mindalnij'和'Hong Iu'。通过便携式荧光计“Floratest”测量叶绿素荧光。研究是在2015 - 2016年8月的第二十年进行的。记录光适应后照射（F0），最大（FM）和固定（FS）值的初始荧光水平。短脱水（4小时）导致荧光参数的增加。长期脱水（24小时）导致所有研究指标的显着降低。观察到最低值In'Kryimskij Amur'（控制），与其他研究的品种相比，其展示了其最低的干旱抵抗力。经过长时间的萎，叶片在本品种恢复差（7.5-64.5％）。揭示了计算出的荧光参数与叶子中的总水含量之间的相关性（0.4-0.8）。 'Budapest *的特点是缓慢损失水分，并且由于这种高（32-81.4％）叶片后24小时萎缩后的恢复。然而，在长时间萎缩后，叶片叶绿素荧光的指标几乎没有再生。在“Mindalnij”的叶子Turgor，在长时间萎缩后恢复得更慢（7-62.4％），但它的特征在于低含水量的高光合活性。 'Hong Iu'展示了高价值的荧光过程再生，以及叶Turgor恢复。它的特征在于具有很高的潜力，并且对于供水不足的区域具有很有希望的区域，以及用于育种抗旱的育种。

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