Volume 10, Issue 45 (vol. 10, no. 45 2021)                   2021, 10(45): 15-26 | Back to browse issues page

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Gholami A R, Hashempour A, arji I, Hadjiamiri A. Growth, physiological and biochemical response of six commercial olive cultivars to kaolin foliar application in warm conditions. Plant Process and Function 2021; 10 (45) : 2
URL: http://jispp.iut.ac.ir/article-1-1551-en.html
1- Crop and Horticultural Science Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran , Rahmatollah Gholami
2- Department of Post-harvest Physiology and Technology, Citrus and Subtropical Fruits Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Ramsar, Iran.
3- Department of Production Engineering and PlantGenetics,Campus of Agriculture and Natural Resources, Facultyof Science and Agricultural Engineering, Razi University,Kermanshah, Iran
4- Crop and Horticultural Science Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran.
Abstract:   (996 Views)
In order to investigate the effects of kaolin foliar application on growth, physiological and biochemical characteristics of some olive cultivars in Dalahu Olive Research Station in Sarpolzahab city, a factorial experiment in a randomized complete block design with three replications and two factors (Olive cultivars and kaolin concentrations) was done in 2019. The used six olive cultivars included Amphysis, Sevillana, Roughani, Manzanilla, Konservolia and Zard. Two stages of complete foliar spraying of olive trees with kaolin at zero concentrations as control (foliar spraying), 2 and 4% in mid-July and mid-August (due to hot and dry weather during this period) were carried out and its effects on growth, physiological and biochemical characteristics of olive cultivars were evaluated. The desired vegetative traits such as length and diameter of stem as well as relative leaf water content, ion leakage, leaf proline content, total phenolic contents, total soluble sugars, chlorophyll content and catalase and peroxidase activity were measured in different treatments and cultivars. The results showed that the response of the studied olive cultivars to foliar application of different levels of kaolin was different. Manzanilla cultivar with the highest relative content of leaf water (79.97%) and soluble sugars (10.78 mg.g-1 FW) and the lowest ion leakage rate (9.02%) and malondialdehyde (1.47 nmol.g-1 FW) ) and Konservolia cultivar with the highest amount of total chlorophyll (1.5 mg.g-1 FW) and peroxidase (2.57 units.mg-1) and catalase (0.96 units.mg-1) were the best cultivars. Foliar application of kaolin improved growth characteristics, relative water content of leaves and chlorophyll content of olive cultivars in hot conditions. Also, kaolin used in olive cultivars reduced the accumulation of malondialdehyde and total phenol, which was associated with enhanced activity of antioxidant enzymes. Generally, the results of this study showed that kaolin spraying can be used to protect olive in warm regions.  
Article number: 2
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Type of Study: Research | Subject: Horticulture
Received: 2021/06/12 | Accepted: 2021/09/4 | Published: 2021/12/20

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