Volume 14, Issue 66 (vol. 14, no. 66 2025)
2025, 14(66): 65-86 |
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Jalali M, Khaleghi E, Moallemi N, Zivdar S, Rahmati Jonidabad M. The effect of manual and chemical thinning on quantitative and hormonal changes in different stages of Khadrawi dates. Plant Process and Function 2025; 14 (66) : 5
URL: http://jispp.iut.ac.ir/article-1-2100-en.html
URL: http://jispp.iut.ac.ir/article-1-2100-en.html
Mansour Jalali1 
, Esmaeil Khaleghi * 2, Noorollah Moallemi1 , Shohreh Zivdar1 , Mostafa Rahmati Jonidabad3
, Esmaeil Khaleghi * 2, Noorollah Moallemi1 , Shohreh Zivdar1 , Mostafa Rahmati Jonidabad3
1- Department of Horticultural Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2- Department of Horticultural Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran ,KHALEGHI@SCU.AC.IR
3- Department of Horticultural Sciences, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Khuzestan, Iran
2- Department of Horticultural Science, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran ,
3- Department of Horticultural Sciences, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Khuzestan, Iran
Abstract: (10 Views)
This study was conducted to investigate the effect of manual and chemical thinning on the quantitative characteristics and hormonal changes in different stages of the fruit of the Khadrawi palm date at Shahid Chamran University of Ahvaz in 2022 and 2023. This experiment was done as a factorial design based on a randomized complete block design with 3 replications. Factors included manual and chemical thinning. The experimental factors included: manual thinning (no manual thinning, removal of 33%, removal of 25% of the total number of clusters) and chemical thinning (zero, 50 and 100 mg/liter of naphthalene acetic acid). Auxin, gibberellin, zeatin, and abscisic acid, as well as quantitative traits evaluated, including fresh weight, length, diameter, length-to-diameter ratio, flesh weight, volume, and fruit-specific weight, were measured. The results showed that the interaction effect of manual and chemical thinning had a significant effect on quantitative traits such as fresh weight and fruit diameter in all stages and on length, flesh weight and fruit volume in all stages except the kimri stage. Also, the interaction effect of manual and chemical thinning on the concentration of internal hormones cytokinin and abscisic acid in all stages and internal auxin hormone in all stages except kimri stage and internal gibberellin hormone had a significant effect in all stages except tamar stage. The results showed that quantitative traits, including fruit fresh weight, length and diameter, as well as fruit flesh weight, increased until the middle of the growth stage (khalal) and then decreased. In general, the obtained results showed that manual thinning treatment by removing one-fourth (25%) of the total number of clusters and chemical thinning with 100 mg/liter of naphthalene acetic acid resulted in a quantitative trait improvement in the date fruit of the Khadrawi variety, and palm growers are recommended.
Article number: 5
Type of Study: Applicable |
Subject:
Plant Growth Regulators
Received: 2024/07/31 | Accepted: 2024/11/26 | Published: 2025/06/22
Received: 2024/07/31 | Accepted: 2024/11/26 | Published: 2025/06/22
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