Thermal Stresses in Maize: Effects and Management Strategies
Open Access
- 4 February 2021
- Vol. 10 (2), 293
- https://doi.org/10.3390/plants10020293
Abstract
Climate change can decrease the global maize productivity and grain quality. Maize crop requires an optimal temperature for better harvest productivity. A suboptimal temperature at any critical stage for a prolonged duration can negatively affect the growth and yield formation processes. This review discusses the negative impact of temperature extremes (high and low temperatures) on the morpho-physiological, biochemical, and nutritional traits of the maize crop. High temperature stress limits pollen viability and silks receptivity, leading to a significant reduction in seed setting and grain yield. Likewise, severe alterations in growth rate, photosynthesis, dry matter accumulation, cellular membranes, and antioxidant enzyme activities under low temperature collectively limit maize productivity. We also discussed various strategies with practical examples to cope with temperature stresses, including cultural practices, exogenous protectants, breeding climate-smart crops, and molecular genomics approaches. We reviewed that identified quantitative trait loci (QTLs) and genes controlling high- and low temperature stress tolerance in maize could be introgressed into otherwise elite cultivars to develop stress-tolerant cultivars. Genome editing has become a key tool for developing climate-resilient crops. Moreover, challenges to maize crop improvement such as lack of adequate resources for breeding in poor countries, poor communication among the scientists of developing and developed countries, problems in germplasm exchange, and high cost of advanced high-throughput phenotyping systems are discussed. In the end, future perspectives for maize improvement are discussed, which briefly include new breeding technologies such as transgene-free clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated (Cas)-mediated genome editing for thermo-stress tolerance in maize.Keywords
This publication has 140 references indexed in Scilit:
- A natural variant of NAL1, selected in high-yield rice breeding programs, pleiotropically increases photosynthesis rateScientific Reports, 2013
- Negative effects of climate warming on maize yield are reversed by the changing of sowing date and cultivar selection in Northeast ChinaGlobal Change Biology, 2013
- Maize seed coatings and seedling sprayings with chitosan and hydrogen peroxide: their influence on some phenological and biochemical behaviorsJournal of Zhejiang University-SCIENCE B, 2013
- Chilling Tolerance of Central European Maize Lines and their Factorial CrossesAnnals of Botany, 2007
- The effect of drought and heat stress on reproductive processes in cerealsPlant, Cell & Environment, 2007
- Root morphology and photosynthetic performance of maize inbred lines at low temperatureEuropean Journal of Agronomy, 2007
- Comprehensive Expression Profiling of Rice Grain Filling-Related Genes under High Temperature Using DNA MicroarrayPlant Physiology, 2007
- Cold Nights Impair Leaf Growth and Cell Cycle Progression in Maize through Transcriptional Changes of Cell Cycle GenesPlant Physiology, 2007
- REACTIVE OXYGEN SPECIES: Metabolism, Oxidative Stress, and Signal TransductionAnnual Review of Plant Biology, 2004
- High Temperatures during Endosperm Cell Division in Maize: A Genotypic Comparison under In Vitro and Field ConditionsCrop Science, 2001