Research article - Peer-reviewed, 2019
Concurrent Drought and Temperature Stress in Rice—A Possible Result of the Predicted Climate Change: Effects on Yield Attributes, Eating Characteristics, and Health Promoting Compounds
Mukamuhirwa, Alphonsine; Hovmalm, Helena Persson; Bolinsson, Hans; Ortiz, Rodomiro; Nyamangyoku, Obedi; Johansson, EvaAbstract
Despite the likely increasing co-occurrence of drought and heat stress, not least in equatorial regions, due to climate change, little is known about the combinational effect of these stresses on rice productivity and quality. This study evaluated the impact of simultaneous drought and temperature stress on growth, grain yield, and quality characteristics of seven rice cultivars from Rwanda, grown in climate chambers. Two temperature ranges23/26 degrees C night/day and 27/30 degrees C night/daytogether with single or repeated drought treatments, were applied during various plant developmental stages. Plant development and yield were highly influenced by drought, while genotype impacted the quality characteristics. The combination of a high temperature with drought at the seedling and tillering stages resulted in zero panicles for all evaluated cultivars. The cultivar Intsindagirabigega' was most tolerant to drought, while Zong geng' was the most sensitive. A stress memory was recorded for Mpembuke' and Ndamirabahinzi', and these cultivars also had a high content of bioactive compounds, while 'Jyambere' showed a high total protein content. Thus, climate change may severely impact rice production. The exploitation of genetic diversity to breed novel rice cultivars that combine drought and heat stress tolerance with high nutritional values is a must to maintain food security.Keywords
Oryza sativa; grain yield; quality; bioactive compounds; drought; temperaturePublished in
International journal of environmental research and public health2019, volume: 16, number: 6, article number: 1043
Authors' information
Mukamuhirwa, Alphonsine
Swedish University of Agricultural Sciences, Department of Plant Breeding
Swedish University of Agricultural Sciences, Department of Plant Breeding
Bolinsson, Hans
Lund University
Swedish University of Agricultural Sciences, Department of Plant Breeding
Nyamangyoku, Obedi
University of Rwanda
Swedish University of Agricultural Sciences, Department of Plant Breeding
Sustainable Development Goals
SDG13 Climate action
SDG2 Zero hunger
UKÄ Subject classification
Agricultural Science
Publication Identifiers
DOI: https://doi.org/10.3390/ijerph16061043
URI (permanent link to this page)
https://res.slu.se/id/publ/99151