Apple Peel Biochemical Changes after Foliar Application of Combined Boron and Calcium II. Photosynthetic Pigments, Total Peroxides and Photochemical Efficiency

• 作者: A. Mwije E. Lötze E. W. Hoffman
• 来源期刊: 美国植物学期刊(英文)
• 学科: 数学
• 关键词: Carotenoids CHLOROPHYLL Total Peroxides Malus domestica ‘Cripps Pink’
• 年，卷（期）: 2020,（6）
• 页码范围: 939-964
• 页数: 26页
• 分类号: O17

摘要

Understanding of the physiological effect of post-full-bloom foliar boron combined with calcium (B+Ca) on apple (<i><span style="font-family:Verdana;">Malus</span></i> <i><span style="font-family:Verdana;">domestica</span></i><span style="font-family:Verdana;">) peel tissues is envisaged to give way to the unknown mode-of-action by which these mineral regimens suppress fruit sunburn-browning incidence in orchards. Promotion of this mineral approach among growers, as a certainly cheaper alternative to mitigate fruit sunburn-browning incidence in apple orchards necessitates clear elucidation of its mode-of-action. This study investigated peel photosynthetic pigments and total peroxides (as a measure of oxidative stress) in three apple cultivars, </span><span style="font-family:Verdana;">‘</span><span style="font-family:Verdana;">Cripps Pink</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">, </span><span style="font-family:Verdana;">‘</span><span style="font-family:Verdana;">Golden Delicious</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;"> and </span><span style="font-family:Verdana;">‘</span><span style="font-family:Verdana;">Granny Smith</span><span style="font-family:Verdana;">’</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> which were treated with four B+Ca treatments varying in levels of B and Ca as well as inclusion of zinc (Zn) in one treatment. Randomized complete block design experiments with five replications were conducted at commercial farms in Western Cape, South Africa. Significant (</span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;"> < </span><i><span style="font-family:Verdana;">0.05</span></i><span style="font-family:Verdana;">) treatment effect for major pigment aspects and total peroxides occurred in all cultivars, but with strong influence of cultivar and fruit age. For instance, effect of varying B, Ca and possible B+Ca duet-effect on photosynthet