Impacts of kinetin implementation on leaves, floral and root-related traits during seed production in hybrid rice under water deficiency

BMC Plant Biology

Research

Khairiah Mubarak Alwutayd¹  Diaa Abd El Moneim²  Medhat Rehan³  Eman M. Bleih⁴  Sabry A. EL-Naem⁴  Mohamed I. Ghazy⁴  Hassan Sh. Hamad⁴  Elsayed F. A. Arafat⁴  Wael H. EL-Kallawy⁴  Elsayed E. Gewaily⁴ 

[1] Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, 11671, Riyadh, Saudi Arabia;Department of Plant Production (Genetic Branch), Faculty of Environmental Agricultural Sciences, Arish University, 45511, El-Arish, Egypt;Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraydah, Saudi Arabia;Department of Genetics, Faculty of Agriculture, Kafrelsheikh University, 33516, Kafr El-Sheikh, Egypt;Rice Research and Training Department, Field Crops Research Institute, Agricultural Research Center, 33717, Kafrelsheikh, Egypt;

关键词: CMS lines;    Growth traits;    Drought stress;    Kinetin;    Plant root;    Sustainability;   

DOI  :  10.1186/s12870-023-04405-6

 received in 2023-06-03, accepted in 2023-08-07,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundWater deficit is one of the most significant abiotic factors affecting rice and agricultural production worldwide. In hybrid rice, cytoplasmic male sterility (CMS) is an important technique for creating high-yielding crop based on heterosis. The phytohormone kinetin (Kin) regulates cell division in plant during the early stages of grain formation, as well as flow assimilation and osmotic regulation under water stress. The present study performed to estimate the effects of irrigation intervals (irrigation each six days (I6), nine days (I9), twelve days (I12) and fifteen days (I15) against continuous flooding (CF, each three days)) and kinetin exogenously application (control, 15 mg L−1 and 30 mg L−1) on hybrid rice (L1, IR69625A; L2, G46A and R, Giza 178 R) seed production.ResultsLeaves traits (Chlorophyll content (CHC), relative water content (RWC), stomatal conductance (SC), Leaf temperature (LT) and transpiration rate (TR)), floral traits such as style length (SL) and total stigma length (TSL), in addition to root traits (i.e., root length (RL), root volume (RV), root: shoot ratio (RSR), root thickness (RT), root xylem vessels number (RXVN) and root xylem vessel area (RXVA) were evaluated and a significant enhancement in most traits was observed. Applying 30 mg L−1 kinetin significantly and positively enhanced all growth, floral and roots traits (RV and RXVA recorded the most increased values by 14.8% and 23.9%, respectively) under prolonging irrigation intervals, in comparison to non-treated plants.ConclusionsSubsequently, spraying kinetin exogenously on foliar could be an alternative method to reduce the harmful influences of water deficiency during seed production in hybrid rice.

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

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