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Fahad S, Hussain S, Saud S, et al. Exogenously Applied Plant Growth Regulators Enhance the Morpho-Physiological Growth and Yield of Rice under High Temperature. Front Plant Sci. 2016;7:1250doi: 10.3389/fpls.2016.01250.
Fahad, S., Hussain, S., Saud, S., Hassan, S., Ihsan, Z., Shah, A. N., Wu, C., Yousaf, M., Nasim, W., Alharby, H., Alghabari, F., & Huang, J. (2016). Exogenously Applied Plant Growth Regulators Enhance the Morpho-Physiological Growth and Yield of Rice under High Temperature. Frontiers in plant science, 71250. https://doi.org/10.3389/fpls.2016.01250
Fahad, Shah, et al. "Exogenously Applied Plant Growth Regulators Enhance the Morpho-Physiological Growth and Yield of Rice under High Temperature." Frontiers in plant science vol. 7 (2016): 1250. doi: https://doi.org/10.3389/fpls.2016.01250
Fahad S, Hussain S, Saud S, Hassan S, Ihsan Z, Shah AN, Wu C, Yousaf M, Nasim W, Alharby H, Alghabari F, Huang J. Exogenously Applied Plant Growth Regulators Enhance the Morpho-Physiological Growth and Yield of Rice under High Temperature. Front Plant Sci. 2016 Aug 30;7:1250. doi: 10.3389/fpls.2016.01250. eCollection 2016. PMID: 27625658; PMCID: PMC5003834.
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Front Plant Sci. 2016 Aug 30;7:1250. doi: 10.3389/fpls.2016.01250. eCollection 2016.

Exogenously Applied Plant Growth Regulators Enhance the Morpho-Physiological Growth and Yield of Rice under High Temperature.

Frontiers in plant science

Shah Fahad, Saddam Hussain, Shah Saud, Shah Hassan, Zahid Ihsan, Adnan N Shah, Chao Wu, Muhammad Yousaf, Wajid Nasim, Hesham Alharby, Fahad Alghabari, Jianliang Huang

Affiliations

  1. National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China.
  2. College of Resources and Environment, Huazhong Agricultural University Wuhan, China.
  3. Department of Horticulture, Northeast Agricultural University Harbin, China.
  4. Department of Agricultural Extension Education and Communication, The University of Agriculture, Peshawar Peshawar, Pakistan.
  5. Department of Arid Land Agriculture, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdul Aziz University Jeddah, Saudi Arabia.
  6. Department of Environmental Sciences, COMSATS Institute of Information Technology Vehari, Pakistan.
  7. Department of Biological Sciences, Faculty of Sciences, King Abdulaziz University Jeddah, Saudi Arabia.
  8. National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China; Hubei Collaborative Innovation Center for Grain Industry, Yangtze UniversityHubei, China.

PMID: 27625658 PMCID: PMC5003834 DOI: 10.3389/fpls.2016.01250

Abstract

A 2-year experiment was conducted to ascertain the effects of exogenously applied plant growth regulators (PGR) on rice growth and yield attributes under high day (HDT) and high night temperature (HNT). Two rice cultivars (IR-64 and Huanghuazhan) were subjected to temperature treatments in controlled growth chambers and four different combinations of ascorbic acid (Vc), alpha-tocopherol (Ve), brassinosteroids (Br), methyl jasmonates (MeJA), and triazoles (Tr) were applied. High temperature severely affected rice morphology, and also reduced leaf area, above-, and below-ground biomass, photosynthesis, and water use efficiency, while increased the leaf water potential of both rice cultivars. Grain yield and its related attributes except number of panicles, were reduced under high temperature. The HDT posed more negative effects on rice physiological attributes, while HNT was more detrimental for grain formation and yield. The Huanghuazhan performed better than IR-64 under high temperature stress with better growth and higher grain yield. Exogenous application of PGRs was helpful in alleviating the adverse effects of high temperature. Among PGR combinations, the Vc+Ve+MejA+Br was the most effective treatment for both cultivars under high temperature stress. The highest grain production by Vc+Ve+MejA+Br treated plants was due to enhanced photosynthesis, spikelet fertility and grain filling, which compensated the adversities of high temperature stress. Taken together, these results will be of worth for further understanding the adaptation and survival mechanisms of rice to high temperature and will assist in developing heat-resistant rice germplasm in future.

Keywords: cultivars; high night temperature; morpho-physiological growth; plant growth regulators; spikelet fertility; water use efficiency

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