ORIGINAL RESEARCH
Improving Water-Deficit Stress Tolerance
in Rice (Oryza sativa L.) by Paclobutrazol
Exogenous Application
1
Department of Agribusiness and Consumer Sciences, College of Agriculture & Food Sciences, King Faisal University,
Al-Ahsa 31982, Saudi Arabia
2
Department of Natural Resources Management, North Dakota State University, Fargo, ND 58102, USA
3
Rice Research Department, Agricultural Research Center (ARC), Giza, Egypt
4
Department of Agricultural Botany, Faculty of Agriculture, Kafrelsheikh University, 33516, Kafrelsheikh, Egypt
5
EPCRS Excellence Center, Plant Pathology and Biotechnology Laboratory, Agricultural Botany Department,
Faculty of Agriculture, Kafrelsheikh University, 33516, Egypt
6
Social Studies Department, College of Arts, King Faisal University, Al-Ahsa 31982, Saudi Arabia
7
Hotel Studies Department, Faculty of Tourism and Hotels, Mansoura University, Mansoura, Egypt
Submission date: 2023-11-28
Final revision date: 2023-12-16
Acceptance date: 2024-01-08
Online publication date: 2024-03-01
Publication date: 2024-04-09
Corresponding author
Ahmed Hassan Abdou
Social Studies Department, College of Arts, King Faisal Univer-sity, Al-Ahsa 31982, Saudi Arabia
Social Studies Department, College of Arts, King Faisal Univer-sity, Al-Ahsa 31982, Saudi Arabia
Pol. J. Environ. Stud. 2024;33(3):3055-3066
KEYWORDS
TOPICS
ABSTRACT
This study was carried during 2023 successive summer growing season on rice (Oryza sativa L.)
variety (Giza 183). The investigation aimed to study the effects of paclobutrazol (PBZ) at 90 and
120 mg/L on rice under water deficit stress conditions on growth, relative water content, chlorophyll
(chl.) pigments, antioxidant enzymes activity, anatomical parameters, as well as yield and yield
component. The results showed that, the highest values of plant growth parameters, chl. contents,
anatomical differences of stem and leaf as well as yield and yield component were achieved by PBZ
at 90 mg/L. The results indicated that, application of PBZ at 90 mg/L mitigated the adverse effects of
water deficit stress. Therefore, this study recommends spraying paclobutrazol at 90 mg/L one month
after rice vr. GIZA 183 transplanting.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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