Compared to Australian Cultivars, European Summer Wheat (Triticum aestivum) Overreacts When Moderate Heat Stress Is Applied at the Pollen Development Stage

被引:18
作者
Begcy, Kevin [1 ]
Weigert, Anna [1 ]
Egesa, Andrew Ogolla [1 ,2 ]
Dresselhaus, Thomas [1 ]
机构
[1] Univ Regensburg, Biochem Zentrum Regensburg, Cell Biol & Plant Biochem, D-93053 Regensburg, Germany
[2] Kenyatta Univ, Dept Biochem & Biotechnol, Nairobi 20142, Kenya
来源
AGRONOMY-BASEL | 2018年 / 8卷 / 07期
关键词
wheat; heat stress; heat shock factors (HSF); pollen mitosis; pollen viability; gas exchange parameters; photosynthesis; transpiration; TRANSCRIPTION FACTOR; HIGH-TEMPERATURE; ENDOSPERM DEVELOPMENT; WATER-STRESS; WINTER-WHEAT; SEED SIZE; PHOTOSYNTHESIS; DROUGHT; TOMATO; PLANT;
D O I
10.3390/agronomy8070099
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Heat stress frequently imposes a strong negative impact on vegetative and reproductive development of plants leading to severe yield losses. Wheat, a major temperate crop, is more prone to suffer from increased temperatures than most other major crops. With heat waves becoming more intense and frequent, as a consequence of global warming, a decrease in wheat yield is highly expected. Here, we examined the impact of a short-term (48 h) heat stress on wheat imposed during reproduction at the pollen mitosis stage both, at the physiological and molecular level. We analyzed two sets of summer wheat germplasms from Australia (Kukri, Drysdale, Gladius, and RAC875) and Europe (Epos, Cornetto, Granny, and Chamsin). Heat stress strongly affected gas exchange parameters leading to reduced photosynthetic and transpiration rates in the European cultivars. These effects were less pronounced in Australian cultivars. Pollen viability was also reduced in all European cultivars. At the transcriptional level, the largest group of heat shock factor genes (type A HSFs), which trigger molecular responses as a result of environmental stimuli, showed small variations in gene expression levels in Australian wheat cultivars. In contrast, HSFs in European cultivars, including Epos and Granny, were strongly downregulated and partly even silenced, while the high-yielding variety Chamsin displayed a strong upregulation of type A HSFs. In conclusion, Australian cultivars are well adapted to moderate heat stress compared to European summer wheat. The latter strongly react after heat stress application by downregulating photosynthesis and transpiration rates as well as differentially regulating HSFs gene expression pattern.
引用
收藏
页数:16
相关论文
共 51 条
  • [1] [Anonymous], 2017, AGR PROD CROPS
  • [2] The effect of drought and heat stress on reproductive processes in cereals
    Barnabas, Beata
    Jaeger, Katalin
    Feher, Attila
    [J]. PLANT CELL AND ENVIRONMENT, 2008, 31 (01) : 11 - 38
  • [3] Epigenetic responses to abiotic stresses during reproductive development in cereals
    Begcy, Kevin
    Dresselhaus, Thomas
    [J]. PLANT REPRODUCTION, 2018, 31 (04) : 343 - 355
  • [4] Tracking maize pollen development by the Leaf Collar Method
    Begcy, Kevin
    Dresselhaus, Thomas
    [J]. PLANT REPRODUCTION, 2017, 30 (04) : 171 - 178
  • [5] Drought stress delays endosperm development and misregulates genes associated with cytoskeleton organization and grain quality proteins in developing wheat seeds
    Begcy, Kevin
    Walia, Harkamal
    [J]. PLANT SCIENCE, 2015, 240 : 109 - 119
  • [6] A Novel Stress-Induced Sugarcane Gene Confers Tolerance to Drought, Salt and Oxidative Stress in Transgenic Tobacco Plants
    Begcy, Kevin
    Mariano, Eduardo D.
    Gentile, Agustina
    Lembke, Carolina G.
    Zingaretti, Sonia Marli
    Souza, Glaucia M.
    Menossi, Marcelo
    [J]. PLOS ONE, 2012, 7 (09):
  • [7] Tomato heat stress transcription factor HsfB1 represents a novel type of general transcription coactivator with a histone-like motif interacting with the plant CREB binding protein ortholog HAC1
    Bharti, K
    von Koskull-Döring, P
    Bharti, S
    Kumar, P
    Tintschl-Körbitzer, A
    Treuter, E
    Nover, L
    [J]. PLANT CELL, 2004, 16 (06) : 1521 - 1535
  • [8] High temperature effects on photosynthetic activity of two tomato cultivars with different heat susceptibility
    Camejo, D
    Rodríguez, P
    Morales, A
    Dell'Amico, JM
    Torrecillas, A
    Alarcón, JJ
    [J]. JOURNAL OF PLANT PHYSIOLOGY, 2005, 162 (03) : 281 - 289
  • [9] Large Differences in Gene Ex pression Responses to Drought and Heat Stress between Elite Barley Cultivar Scarlett and a Spanish Landrace
    Cantalapiedra, Carlos P.
    Garcia-Pereira, Maria J.
    Gracia, Maria P.
    Igartua, Ernesto
    Casas, Ana M.
    Contreras-Moreira, Bruno
    [J]. FRONTIERS IN PLANT SCIENCE, 2017, 8
  • [10] Chakrabarti B, 2011, AUST J CROP SCI, V5, P1039