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

Open access
Fahad, Shah, Hussain, Saddam, Saud, Shah, Hassan, Shah, Ihsan, Zahid, Shah, Adnan N., Wu, Chao, Yousaf, Muhammad, Nasim, Wajid, Alharby, Hesham, Alghabari, Fahad, Huang, Jianliang·2016·Frontiers in Plant Science

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.

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Cites

Show all 49 references

Research works printed but not linked: 21

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Metadata

Authors
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.
Venue
Frontiers in Plant Science
Published
2016-08-30
Volume
7
Pages
1250-1250
ISSN
1664-462X (ISSN-L)
OpenAlex
W2515844474
Cited by
258
References
49
FWCI
21.38
Type
journal article
Language
en
Open access
gold
Funders
National Natural Science Foundation of China (No.31361140368)

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CoChat. (2026). Citation check: Exogenously Applied Plant Growth Regulators Enhance the Morpho-Physiological Growth and Yield of Rice under High Temperature. https://app.cochat.ai/papers/10.3389/fpls.2016.01250
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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. https://doi.org/10.3389/fpls.2016.01250

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