Delayed transplanting reduced grain yield due to low temperature stress at anthesis in machine-transplanted late-season rice

2019 ◽  
Vol 55 (6) ◽  
pp. 843-848 ◽  
Author(s):  
Min Huang ◽  
Shengliang Fang ◽  
Shuanglü Shan ◽  
Yingbin Zou
Keyword(s):  
Low Temperature ◽  
Grain Yield ◽  
Temperature Stress ◽  
Large Scale ◽  
Growing Season ◽  
Low Temperature Stress ◽  
Growth Stages ◽  
Rice Cultivars ◽  
Yield Attributes ◽  
Late Season

AbstractThe development of mechanised large-scale farming has led to changes in rice production systems. Increases in time of farming operations often occur under large-scale farming conditions, which can lead to delayed transplanting (DTP). In this study, field experiments were conducted in the late rice-growing season in 2016 and 2017 to compare the growth stages, growing-season temperature and yield attributes between normal transplanting with 15- to 20-day-old seedlings and DTP with 30-day-old seedlings of two rice cultivars. DTP resulted in 6- and 12-day delays in heading stage for both cultivars in 2016 and 2017, respectively. As a consequence, low temperature stress occurred at anthesis under DTP in both years, which led to significantly reduced spikelet filling and grain yield under DTP for both cultivars. These results confirm that DTP can reduce spikelet filling and grain yield due to low temperature stress at anthesis in machine-transplanted late-season rice. This finding highlights that greater efforts should be made to develop high-yielding short-duration rice cultivars to meet the development of mechanised large-scale rice farming.

Gene-Coexpression Network Analysis Identifies Specific Modules and Hub Genes Related to Cold Stress in Rice

2021 ◽  
Author(s):  
Zhichi Zeng ◽  
Sichen Zhang ◽  
Wenyan Li ◽  
Baoshan Chen ◽  
Wenlan Li
Keyword(s):  
Network Analysis ◽  
Low Temperature ◽  
Cold Stress ◽  
Cold Tolerance ◽  
Temperature Stress ◽  
Low Temperature Stress ◽  
Rice Cultivars ◽  
Hub Genes ◽  
New Genes ◽  
Short Period

Abstract Background: When plants are subjected to cold stress, they undergo a series of molecular and physiological changes to protect themselves from injury. Indica cultivars can usually withstand only mild cold stress in a relatively short period. Hormone-mediated defence response plays an important role in cold stress. Weighted gene co-expression network analysis (WGCNA) is a very useful tool for studying the correlation between genes, identifying modules with high phenotype correlation, and identifying Hub genes in different modules. Many studies have elucidated the molecular mechanisms of cold tolerance in different plants, but little information about the recovery process after cold stress is available.Results: To understand the molecular mechanism of cold tolerance in rice, we performed comprehensive transcriptome analyses during cold treatment and recovery stage in two cultivars of near-isogenic lines (9311 and DC907). Twelve transcriptomes in two rice cultivars were determined. A total of 2509 new genes were predicted by fragment splicing and assembly, and 7506 differentially expressed genes were identified by pairwise comparison. A total of 26 modules were obtained by expression-network analysis, 12 of which were highly correlated with cold stress or recovery treatment. We further identified candidate Hub genes associated with specific modules and analysed their regulatory relationships based on coexpression data. Results showed that various plant-hormone regulatory genes acted together to protect plants from physiological damage under short-term low-temperature stress. We speculated that this may be common in rice. Under long-term cold stress, rice improved the tolerance to low-temperature stress by promoting autophagy, sugar synthesis, and metabolism.Conclusion: Through WGCNA analysis at the transcriptome level, we provided a potential regulatory mechanism for the cold stress and recovery of rice cultivars and identified candidate central genes. Our findings provided an important reference for the future cultivation of rice strains with good tolerance.

scholarly journals Genetics and Breeding of Low-Temperature Stress Tolerance in Rice

2021 ◽  
pp. 221-280
Author(s):  
Sofi Najeeb ◽  
Anumalla Mahender ◽  
Annamalai Anandan ◽  
Waseem Hussain ◽  
Zhikang Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
Stress Tolerance ◽  
Candidate Genes ◽  
Temperature Stress ◽  
Association Studies ◽  
Low Temperature Stress ◽  
Growth Stages ◽  
Rice Varieties ◽  
Long Time ◽  
Mapping Populations

AbstractLow-temperature stress (LTS) is one of the major abiotic stresses that affect crop growth and ultimately decrease grain yield. The development of rice varieties with low-temperature stress tolerance has been a severe challenge for rice breeders for a long time. The lack of consistency of the quantitative trait loci (QTLs) governing LTS tolerance for any given growth stage over different genetic backgrounds of mapping populations under different low-temperature stress conditions remains a crucial barrier for adopting marker-assisted selection (MAS). In this review, we discuss the ideal location and phenotyping for agromorphological and physiological parameters as indicators for LTS tolerance and also the traits associated with QTLs that were identified from biparental mapping populations and diverse rice accessions. We highlight the progress made in the fields of genome editing, genetic transformation, transcriptomics, and metabolomics to elucidate the molecular mechanisms of cold tolerance in rice. The stage-specific QTLs and candidate genes for LTS tolerance brought out valuable information toward identifying and improving LTS tolerance in rice varieties. We showed 578 QTLs and 38 functionally characterized genes involved in LTS tolerance. Among these, 29 QTLs were found to be colocalized at different growth stages of rice. The combination of stage-specific QTLs and genes from biparental mapping populations and genome-wide association studies provide potential information for developing LTS-tolerant rice varieties. The identified colocalized stage-specific LTS-tolerance QTLs will be useful for MAS and QTL pyramiding and for accelerating mapping and cloning of the possible candidate genes, revealing the underlying LTS-tolerance mechanisms in rice.

Physiological, proteomic and transcriptional responses of wheat to combination of drought or waterlogging with late spring low temperature

2014 ◽  
Vol 41 (7) ◽  
pp. 690 ◽  
Author(s):  
Xiangnan Li ◽  
Jian Cai ◽  
Fulai Liu ◽  
Tingbo Dai ◽  
Weixing Cao ◽  
...  
Keyword(s):  
Water Stress ◽  
Low Temperature ◽  
Winter Wheat ◽  
Grain Yield ◽  
Temperature Stress ◽  
Yield Loss ◽  
Low Temperature Stress ◽  
Physiological Level ◽  
Waterlogging Stress ◽  
C Metabolism

Spring low temperature events affect winter wheat (Triticum aestivum L.) during late vegetative or reproductive development, exposing plants to a subzero low temperature stress when winter hardening is lost. The increased climatic variability results in wheat being exposed to more frequent adverse impacts of combined low temperature and water stress, including drought and waterlogging. The responses of potted wheat plants cultivated in climatic chambers to these environmental perturbations were investigated at physiological, proteomic and transcriptional levels. At the physiological level, the depressed carbon (C) assimilation induced by the combined stresses was due mainly to stomatal closure and damage of photosynthetic electron transport. Biochemically, the adaptive effects of early moderate drought or waterlogging stress were associated with the activation of antioxidant enzyme system in chloroplasts and mitochondria of leaf under low temperature. Further proteomic analysis revealed that the oxidative stress defence, C metabolism and photosynthesis related proteins were modulated by the combined low temperature and water stress. Collectively, the results indicate that impairment of photosynthesis and C metabolism was responsible for the grain yield loss in winter wheat under low temperature in combination with severe drought or waterlogging stress. In addition, prior mild drought or waterlogging contributed to the homeostasis of oxidative metabolism and relatively better photosynthesis, and hence to less grain yield loss under later spring low temperature stress.

scholarly journals Responses of Grain Yield and Yield Related Parameters to Post-Heading Low-Temperature Stress in Japonica Rice

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1425
Author(s):  
Iftikhar Ali ◽  
Liang Tang ◽  
Junjie Dai ◽  
Min Kang ◽  
Aqib Mahmood ◽  
...  
Keyword(s):  
Low Temperature ◽  
Grain Yield ◽  
Temperature Stress ◽  
Grain Filling ◽  
Low Temperature Stress ◽  
Maximum Temperature ◽  
Surface Model ◽  
Japonica Rice ◽  
Rice Productivity ◽  
Grain Filling Duration

There is unprecedented increase in low-temperature stress (LTS) during post-heading stages in rice as a consequence of the recent climate changes. Quantifying the effect of LTS on yields is key to unraveling the impact of climatic changes on crop production, and therefore developing corresponding mitigation strategies. The present research was conducted to analyze and quantify the effect of post-heading LTS on rice yields as well as yield and grain filling related parameters. A two-year experiment was conducted during rice growing season of 2018 and 2019 using two Japonica cultivars (Huaidao 5 and Nanjing 46) with different low-temperature sensitivities, at four daily minimum/maximum temperature regimes of 21/27 °C (T1), 17/23 °C (T2), 13/19 °C (T3) and 9/15 °C (T4). These temperature treatments were performed for 3 (D1), 6 (D2) or 9 days (D3), at both flowering and grain filling stages. We found LTS for 3 days had no significant effect on grain yield, even when the daily mean temperature was as low as 12 °C. However, LTS of between 6 and 9 days at flowering but not at filling stage significantly reduced grain yield of both cultivars. Comparatively, Huaidao 5 was more cold tolerant than Nanjing 46. LTS at flowering and grain filling stages significantly reduced both maximum and mean grain filling rates. Moreover, LTS prolonged the grain filling duration of both cultivars. Additionally, there was a strong correlation between yield loss and spikelet fertility, spikelet weight at maturity, grain filling duration as well as mean and maximum grain filling rates under post-heading LTS (p < 0.001). Moreover, the effect of post-heading LTS on rice yield can be well quantified by integrating the canopy temperature (CT) based accumulated cold degree days (ACDDCT) with the response surface model. The findings of this research are useful in modeling rice productivity under LTS and for predicting rice productivity under future climates.

scholarly journals Evaluation of Late-Season Short- and Long-Duration Rice Cultivars for Potential Yield under Mechanical Transplanting Conditions

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1307
Author(s):  
Jiana Chen ◽  
Ruichun Zhang ◽  
Fangbo Cao ◽  
Xiaohong Yin ◽  
Yingbin Zou ◽  
...  
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Large Scale ◽  
Radiation Use Efficiency ◽  
Rice Cultivars ◽  
Filling Rate ◽  
Late Season ◽  
Long Duration ◽  
Use Efficiency ◽  
Radiation Use

The development of large-scale farming has encouraged the adoption of mechanical transplanting techniques for rice production. However, the increased farming operation times that often occur under large-scale farming conditions necessitate shortening the duration of rice growth, especially that of late-season rice; therefore, rice cultivars with short growth durations are popular under such conditions. A field experiment using two short-duration rice cultivars (SRCs), i.e., Jiuliangyou 3 and Shengyou 9520, and two long-duration rice cultivars (LRCs), i.e., Shengyou 957 and Tianyouhuazhan, was conducted in the late season in Yongan and Santang, Hunan Province, China in 2017 and 2018. The grain yield and yield attributes were compared between the SRCs and LRCs, showing that the SRCs, which exhibited an 11–12-day shorter growth period, revealed similar grain yield to the LRCs. The SRCs also exhibited a 10–31% higher spikelet filling rate and a 13% higher harvest index than the LRCs. Moreover, the biomass accumulation, crop growth rate, and apparent radiation use efficiency of the SRCs were significantly higher than those of the LRCs during the postheading phase. Our results indicate that the higher spikelet filling rate, the harvest index, and the apparent radiation use efficiency of the postheading period were the underlying factors for the SRCs’ grain yield.

Effects of low-temperature stress on histone modification in ZF4 cells

2019 ◽  
Vol 26 (2) ◽  
pp. 280
Author(s):  
Penglei JIANG ◽  
Yingdi SHI ◽  
Yanwen HOU ◽  
Bingshe HAN ◽  
Junfang ZHANG
Keyword(s):  
Low Temperature ◽  
Histone Modification ◽  
Temperature Stress ◽  
Low Temperature Stress
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