Next Article in Journal
Volatile Semiochemical Mediated Plant Defense in Cereals: A Novel Strategy for Crop Protection
Previous Article in Journal
Understanding Starch Structure: Recent Progress
Article Menu
Issue 3 (September) cover image

Export Article

Open AccessArticle
Agronomy 2017, 7(3), 57; https://doi.org/10.3390/agronomy7030057

Responses of Fourteen Vietnamese Rice (Oryza sativa L.) Cultivars to High Temperatures during Grain Filling Period under Field Conditions

1
Graduate School of Environmental and Life Science, Okayama University, 700-8530 Okayama, Japan
2
Department of Plant Protection, Cuu Long Delta Rice Research Institute, 904-600 Can Tho, Vietnam
*
Author to whom correspondence should be addressed.
Academic Editors: Steven R. Larson and Peter Langridge
Received: 22 July 2017 / Revised: 18 August 2017 / Accepted: 23 August 2017 / Published: 28 August 2017
View Full-Text   |   Download PDF [2201 KB, uploaded 28 August 2017]   |  

Abstract

High temperatures significantly affect rice grain yield and quality. However, little information is known about the response of indica cultivars, especially Vietnamese cultivars, to high temperature. In this study, field experiments were conducted in 2015 and 2016 to evaluate the response of Vietnamese cultivars under high temperatures during the grain filling period. The high temperature was applied after the first cultivar started anthesis, by opening two sides of a plastic chamber that housed the cultivar when the temperature reached above 36 °C under field conditions. The difference in the maximum temperature between the control and the high temperature treatment was about 1.3 °C to 10.1 °C in 2015, and 0.73 °C to 10.2 °C in 2016. Decreases in crop growth rate (CGR) and yield were correlated with increased temperature conditions during the grain filling period. The grain yield of 14 Vietnamese cultivars fell to 81.5 and 79.4% of the control in 2015 and 2016, respectively. The variable with the greatest impact on grain yield was spikelet sterility induced by high temperature. Under high temperature conditions during the grain filling period, the percentage of grain chalkiness in the high temperature-treatment group increased compared to the control. Our study showed that Vietnamese rice yield and quality were significantly affected by high temperature. View Full-Text
Keywords: crop growth rate; dry matter production; chalkiness; high temperature; spikelet sterility; Vietnamese cultivar; yield crop growth rate; dry matter production; chalkiness; high temperature; spikelet sterility; Vietnamese cultivar; yield
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Thuy, T.L.; Saitoh, K. Responses of Fourteen Vietnamese Rice (Oryza sativa L.) Cultivars to High Temperatures during Grain Filling Period under Field Conditions. Agronomy 2017, 7, 57.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Agronomy EISSN 2073-4395 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top