scholarly journals Blast Resistant Early Maturing Rice ‘Jungmo1024’ with High Temperature Tolerance during Grain Filling Stage

2016 ◽  
Vol 48 (1) ◽  
pp. 72-84 ◽  
Author(s):  
Ji-Ung Jeung ◽  
Young-Seop Shin ◽  
Im-Soo Choi ◽  
Jae-Ki Chang ◽  
Myeong-Ki Kim ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Filling ◽  
Temperature Tolerance ◽  
Filling Stage ◽  
High Temperature Tolerance ◽  
Early Maturing ◽  
Grain Filling Stage

scholarly journals The expression of the gene associated with β-glucan content, β-amylase and limit dextrinase synthesis as affected by post-heading heat stress in barley

2019 ◽  
Author(s):  
Shengjing Ni ◽  
Huifang Zhao ◽  
Guoping Zhang
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Grain Filling ◽  
Quality Trait ◽  
Malt Quality ◽  
Filling Stage ◽  
Limit Dextrinase ◽  
Malt Barley ◽  
Grain Filling Stage ◽  
Barley Genotypes

Abstract Background: Malt barley shows a dramatic deterioration of malt quality when exposed to heat or high temperature stress during grain-filling stage (post heading), and global change results in the more frequent occurrence of high temperature, posing a severe threat to high-quality malt barley production. In a previous study, we found heat stress during grain-filling stage caused the significant reduction of kernel weight, and the significant increase of protein and β-glucan content, and β-amylase and limit dextrinase (LD) activities, and the effect varied with barley genotypes and the time of heat stress exposure.Results: In this study, we determined the relative expressions of HvCslF6 and HvCslF9 for β-glucan, HvBmy1 for β-amylase and LD gene for limit dextrinase of two barley cultivars（ZU9 and Hua30）under the two heat stress (HS) treatments (32/26℃, day/night), initiated from the 7th day (early grain-filling stage) and the14th day (middle grain-filling stage) after heading. In comparison with normal temperature (24/18℃, day/night), HS treatments significantly up-regulated the relative expression of all four genes, and Hua30 being larger than ZU9. The change pattern of each examined gene for the two barley genotypes under heat stress treatments is completely consistent with that of corresponding malt quality trait as affected by heat stress.Conclusion: The results indicate that the enhancement of β-glucan content, and β-amylase and limit dextrinase activities under high temperature during grain filling stage is at least in part attributed to increased expression of the relevant genes.

scholarly journals Study on Improving High-temperature Tolerance for Grain Filling Through Adjusting Sink Size

2013 ◽  
Vol 58 (2) ◽  
pp. 107-112 ◽  
Author(s):  
Junhwan Kim ◽  
Jiyoung Shon ◽  
Kyung-Jin Choi ◽  
Younghwan Yoon ◽  
Chung-Kuen Lee
Keyword(s):  
High Temperature ◽  
Grain Filling ◽  
Temperature Tolerance ◽  
High Temperature Tolerance ◽  
Sink Size

scholarly journals Heat Stress Affects Seed Set and Grain Quality of Vietnamese Rice Cultivars during Heading and Grain Filling Period

2021 ◽  
Vol 8 (03) ◽  
pp. 154-160
Author(s):  
Tran Loc Thuy ◽  
Tran Ngoc Thach ◽  
Tran Thi Thanh Xa ◽  
Chau Thanh Nha ◽  
Vo Thi Tra My ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Yield ◽  
Grain Quality ◽  
Seed Set ◽  
Grain Filling ◽  
Rice Cultivars ◽  
Filling Stage ◽  
Temperature Environment ◽  
Grain Filling Stage ◽  
High Temperature Environment

Environmental stress trigger a variety of rice plant response, ranging from alters seed set, grain yield and grain quality during flowering and grain filling stage.  Efforts are required to improve our understanding of the impact of heat stress on rice production, which are essential strategies in rice cultivation. This article investigated the seed set, yield components and grain yield of Vietnamese rice cultivars (Indica germplasm) under high temperature environment during the flowering and grain filling stage. Six rice cultivars, including popular cultivars and new cultivars of Cuu Long Delta Rice Research Institute, and one popular extraneous cultivar with differences in maturing time, were grown in pots at high temperature (HT) and natural temperature condition as control (CT). All rice cultivars were subjected to the high temperature starting from the heading stage to the harvest maturity, applied by greenhouse effect. The greenhouse has about 25 cm window opening on 3 sides for air ventilation. The seed set rate of the heat-sensitive rice genotypes decreased significantly under HT, leading to a significant reduction in grain yield. The lowest seed set was recorded in “OM4900” (44.3%) and “OM18” (39.9%) under high temperature environment. The lower yield in all rice cultivars at an elevated temperature resulted in a dramatic decrease of filled grains and contributed to a loss of 1000-grain weight. ‘“OM892” is a potential rice cultivar for heat tolerant breeding program due to the seed set percentage was above 80% in both HT and CT conditions. High temperature during the grain filling stage resulted in a decreased amylose and increased chalkiness for all OM cultivars.

Effects of combined high temperature and drought stress on amylose and protein contents at rice grain-filling stage

2012 ◽  
Vol 20 (1) ◽  
pp. 40-47 ◽  
Author(s):  
Huan-Ye GAO ◽  
San-Gen WANG ◽  
Xue-Feng ZONG ◽  
Zhong-Hua TENG ◽  
Fang-Ming ZHAO ◽  
...  
Keyword(s):  
High Temperature ◽  
Drought Stress ◽  
Grain Filling ◽  
Rice Grain ◽  
Filling Stage ◽  
Grain Filling Stage

Impact of high temperature stress during reproductive and grain filling stage in rice

2018 ◽  
Vol 55 (1) ◽  
pp. 126 ◽  
Author(s):  
R Beena ◽  
Veena Vighneswaran ◽  
P Sindhumole ◽  
MC Narayankutty ◽  
SR Voleti
Keyword(s):  
High Temperature ◽  
Temperature Stress ◽  
Grain Filling ◽  
High Temperature Stress ◽  
Filling Stage ◽  
Grain Filling Stage

scholarly journals Mapping wheat QTLS for grain yield related traits under high temperature stress

Genetika ◽  
2020 ◽  
Vol 52 (3) ◽  
pp. 1107-1125
Author(s):  
Mohamed Barakat ◽  
Abdullah Al-Doss ◽  
Khaled Moustafa ◽  
Mohamed Motawei ◽  
Ibrahim Al-Ashkar ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Yield ◽  
Temperature Stress ◽  
Grain Filling ◽  
Interval Mapping ◽  
High Temperature Stress ◽  
Temperature Tolerance ◽  
High Temperature Tolerance ◽  
Heat Susceptibility Index ◽  
Grain Filling Period

Stress induced by high temperature represents a major constraint over wheat production in many production areas. Here, the comprehensive coverage of the wheat genome achievable using single nucleotide polymorphism markers was exploited to carry out a genetic analysis targeting yield components in plants exposed to high temperature stress. The mapping population was a set of doubled haploid lines derived from a cross between the cultivars Yecora Rojo and Ksu106. Both of the parental cultivars and their derived population were tested in the field in two locations over two consecutive seasons; at each site, two sowing dates were included, with the later sowing intended to ensure that the plants were exposed to high temperature stress during the grain filling period. Composite interval mapping detected 93 quantitative trait loci influencing grain yield and some related traits, along with 20 loci associated with a ?heat susceptibility index? (HSI). The loci were distributed over all 21 of the wheat chromosomes. Some of these loci were of large enough effect to be considered as candidates for the marker-assisted breeding of high temperature tolerance in wheat.

scholarly journals Comparison of photosynthetic activity and heat tolerance between near isogenic lines of wheat with different photosynthetic rates

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0255896
Author(s):  
Chongyang Li ◽  
Mingyang Ma ◽  
Tianpeng Zhang ◽  
Pengwen Feng ◽  
Xiao Chen ◽  
...  
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Photosynthetic Rate ◽  
Calvin Cycle ◽  
Grain Filling ◽  
Near Isogenic Lines ◽  
Photosynthetic Rates ◽  
Isogenic Lines ◽  
Filling Stage ◽  
Grain Filling Stage

Wheat (Triticum aestivum L.) is one of the most important crops in the world, but the yield and quality of wheat are highly susceptible to heat stress, especially during the grain-filling stage. Therefore, it is crucial to select high-yield and high-temperature-resistant varieties for food cultivation. There is a positive correlation between the yield and photosynthetic rate of wheat during the entire grain-filling stage, but few studies have shown that lines with high photosynthetic rates can maintain higher thermotolerance at the same time. In this study, two pairs of wheat near isogenic lines (NILs) with different photosynthetic rates were used for all experiments. Our results indicated that under heat stress, lines with a high photosynthetic rate could maintain the activities of photosystem II (PSII) and key Calvin cycle enzymes in addition to their higher photosynthetic rates. The protein levels of D1 and HSP70 were significantly increased in the highly photosynthetic lines, which contributed to maintaining high photosynthetic rates and ensuring the stability of the Calvin cycle under heat stress. Furthermore, we found that lines with a high photosynthetic rate could maintain high antioxidant enzyme activity to scavenge reactive oxygen species (ROS) and reduce ROS accumulation better than lines with a low photosynthetic rate under high-temperature stress. These findings suggest that lines with high photosynthetic rates can maintain a higher photosynthetic rate despite heat stress and are more thermotolerant than lines with low photosynthetic rates.

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