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The Potential Effects of Kinetin Implementation on Hybrid Rice Seed Production under Water Deficit

Author

Listed:
  • Hassan Sh. Hamad

    (Rice Research and Training Department, Field Crops Research Institute, Agricultural Research Center, Kafrelsheikh 33717, Egypt)

  • Eman M. Bleih

    (Rice Research and Training Department, Field Crops Research Institute, Agricultural Research Center, Kafrelsheikh 33717, Egypt)

  • Elsayed E. Gewaily

    (Rice Research and Training Department, Field Crops Research Institute, Agricultural Research Center, Kafrelsheikh 33717, Egypt)

  • Khadiga Alharbi

    (Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia)

  • Medhat Rehan

    (Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
    Department of Genetics, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt)

Abstract

Drought is one of the main abiotic stresses responsible for reducing crop yields worldwide. In hybrid rice production, cytoplasmic male sterility (CMS) displays an alternative plan for producing high-yielding hybrid rice depending on the hybrid vigor. Kinetin (Kin) has an essential role during the early phase of grain setting by regulating cell division, assimilate flow, and osmotic modification under water deficit. Growth, floral, and yield-related traits were evaluated in two CMS lines under five irrigation intervals and two concentrations of the phytohormone kinetin. Our study was conducted to explore the effects of irrigation intervals (continuous flooding (CF), irrigation every six (I 6 ), nine (I 9 ), twelve (I 12 ), and fifteen (I 15 ) days, and kinetin exogenously applied (control, 15 mg L −1 , and 30 mg L −1 ) on growth, floral, and yield-related traits. Growth traits (i.e., number of leaves (NOL), days to complete leaf number (DCLN), days to heading (DTH, 50%), flag leaf area (FLA), and plant height (PH)), floral traits (i.e., duration of spikelet opening (DSO), panicle length (PL), spikelet opening angle (SOA), and panicle exertion (PE)), and seed yield traits (i.e., seed set (SS), panicle weight (PW), seed yield (SY), harvest index (HI), and number of fertile panicles per hill (NFP)) in two CMS lines. Implementation of kinetin displayed the highest significant and positive values for all growth, floral, and yield-related traits when compared to the control (average of applied irrigation intervals). Applying 30 mg L −1 kinetin positively enhanced the growth traits (i.e., NOL, FLA, and PH with 4.1%, 5%, and 3%, respectively), floral traits (i.e., PL, PE, SOA, and DSO with 5.4, 5.7, 5.9, and 5.4%, respectively), and yield-related traits (i.e., PW, SS, SY, HI, and NFP with 22%, 17%, 14%, 14.5%, and 15%, with the same sequence) compared to non-treated plants. Consequently, exogenous foliar spray of kinetin could be an effective process in minimizing the harmful effects (the reduction in PW, SS, SY, HI, and NFP recorded 41%, 61%, 45%, 30%, and 48%, respectively, under I 15 conditions when compared to CF) of water deficit in hybrid rice and increasing seed production.

Suggested Citation

  • Hassan Sh. Hamad & Eman M. Bleih & Elsayed E. Gewaily & Khadiga Alharbi & Medhat Rehan, 2023. "The Potential Effects of Kinetin Implementation on Hybrid Rice Seed Production under Water Deficit," Sustainability, MDPI, vol. 15(7), pages 1-20, March.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:7:p:5623-:d:1105014
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    References listed on IDEAS

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    1. Jinmeng Zhang & Shiqiao Zhang & Min Cheng & Hong Jiang & Xiuying Zhang & Changhui Peng & Xuehe Lu & Minxia Zhang & Jiaxin Jin, 2018. "Effect of Drought on Agronomic Traits of Rice and Wheat: A Meta-Analysis," IJERPH, MDPI, vol. 15(5), pages 1-14, April.
    2. Mohd Zain, Nurul Amalina & Ismail, Mohd Razi, 2016. "Effects of potassium rates and types on growth, leaf gas exchange and biochemical changes in rice (Oryza sativa) planted under cyclic water stress," Agricultural Water Management, Elsevier, vol. 164(P1), pages 83-90.
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