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Pollen grains of heat tolerant tomato cultivars retain higher carbohydrate concentration under heat stress conditions
Year:
2006
Source of publication :
Scientia Horticulturae
Authors :
Althan, Leviah
;
.
Firon, Nurit
;
.
Pressman, Etan
;
.
Rosenfeld, Katerina
;
.
Shaked, Rachel
;
.
Volume :
109
Co-Authors:
Firon, N., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Shaked, R., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Peet, M.M., Department of Horticultural Science, NCSU, Raleigh, NC, United States
Pharr, D.M., Department of Horticultural Science, NCSU, Raleigh, NC, United States
Zamski, E., Institute of Plant Sciences and Genetics, Faculty of Agriculture, Rehovot, 76100, Israel
Rosenfeld, K., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Althan, L., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Pressman, E., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
212
To page:
217
(
Total pages:
6
)
Abstract:
Exposure to high temperatures (heat stress) causes reduced yield in tomatoes (Lycopersicon esculentum), mainly by affecting male gametophyte development. Two experiments were conducted where several tomato cultivars were grown under heat stress, in growth chambers (day/night temperatures of 31/25 °C) or in greenhouses (day/night temperatures of 32/26 °C), or under control (day/night temperatures of 28/22 °C) conditions. In heat-sensitive cultivars, heat stress caused a reduction in the number of pollen grains, impaired their viability and germinability, caused reduced fruit set and markedly reduced the numbers of seeds per fruit. In the heat-tolerant cultivars, however, the number and quality of pollen grains, the number of fruits and the number of seeds per fruit were less affected by high temperatures. In all the heat-sensitive cultivars, the heat-stress conditions caused a marked reduction in starch concentration in the developing pollen grains at 3 days before anthesis, and a parallel decrease in the total soluble sugar concentration in the mature pollen, whereas in the four heat-tolerant cultivars tested, starch accumulation at 3 days before anthesis and soluble sugar concentration at anthesis were not affected by heat stress. These results indicate that the carbohydrate content of developing and mature tomato pollen grains may be an important factor in determining pollen quality, and suggest that heat-tolerant cultivars have a mechanism for maintaining the appropriate carbohydrate content under heat stress. © 2006 Elsevier B.V. All rights reserved.
Note:
Related Files :
Carbohydrate
cultivars
germination
heat stress
heat tolerance
pollen (external)
Starch
sugar
temperature effect
Show More
Related Content
More details
DOI :
10.1016/j.scienta.2006.03.007
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21553
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:45
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Scientific Publication
Pollen grains of heat tolerant tomato cultivars retain higher carbohydrate concentration under heat stress conditions
109
Firon, N., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Shaked, R., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Peet, M.M., Department of Horticultural Science, NCSU, Raleigh, NC, United States
Pharr, D.M., Department of Horticultural Science, NCSU, Raleigh, NC, United States
Zamski, E., Institute of Plant Sciences and Genetics, Faculty of Agriculture, Rehovot, 76100, Israel
Rosenfeld, K., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Althan, L., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Pressman, E., Department of Vegetable Crops, ARO, The Volcani Center, Bet Dagan, Israel
Pollen grains of heat tolerant tomato cultivars retain higher carbohydrate concentration under heat stress conditions
Exposure to high temperatures (heat stress) causes reduced yield in tomatoes (Lycopersicon esculentum), mainly by affecting male gametophyte development. Two experiments were conducted where several tomato cultivars were grown under heat stress, in growth chambers (day/night temperatures of 31/25 °C) or in greenhouses (day/night temperatures of 32/26 °C), or under control (day/night temperatures of 28/22 °C) conditions. In heat-sensitive cultivars, heat stress caused a reduction in the number of pollen grains, impaired their viability and germinability, caused reduced fruit set and markedly reduced the numbers of seeds per fruit. In the heat-tolerant cultivars, however, the number and quality of pollen grains, the number of fruits and the number of seeds per fruit were less affected by high temperatures. In all the heat-sensitive cultivars, the heat-stress conditions caused a marked reduction in starch concentration in the developing pollen grains at 3 days before anthesis, and a parallel decrease in the total soluble sugar concentration in the mature pollen, whereas in the four heat-tolerant cultivars tested, starch accumulation at 3 days before anthesis and soluble sugar concentration at anthesis were not affected by heat stress. These results indicate that the carbohydrate content of developing and mature tomato pollen grains may be an important factor in determining pollen quality, and suggest that heat-tolerant cultivars have a mechanism for maintaining the appropriate carbohydrate content under heat stress. © 2006 Elsevier B.V. All rights reserved.
Scientific Publication
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