Contrasting processing tomato cultivars unlink yield and pollen viability under heat stress

Golan Miller, Avital Beery, Prashant Kumar Singh, Fengde Wang, Rotem Zelingher (), Etel Motenko and Michal Lieberman-Lazarovich
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Golan Miller: Institute of Plant Sciences - Agricultural Research Organization - the Volcani Center
Avital Beery: Institute of Plant Sciences - Agricultural Research Organization - the Volcani Center
Prashant Kumar Singh: Institute of Plant Sciences - Agricultural Research Organization - the Volcani Center, Department of Biotechnology - Mizoram University
Fengde Wang: Institute of Plant Sciences - Agricultural Research Organization - the Volcani Center, Institute of vegetables and flowers - SAAS - Shandong Academy of Agricultural Sciences
Rotem Zelingher: Institute of Plant Sciences - Agricultural Research Organization - the Volcani Center, ECO-PUB - Economie Publique - AgroParisTech - Université Paris-Saclay - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement
Etel Motenko: Institute of Plant Sciences - Agricultural Research Organization - the Volcani Center
Michal Lieberman-Lazarovich: Institute of Plant Sciences - Agricultural Research Organization - the Volcani Center

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Abstract: Climate change is causing temperature increment in crop production areas worldwide, generating conditions of heat stress that negatively affect crop productivity. Tomato (Solanum lycopersicum), a major vegetable crop, is highly susceptible to conditions of heat stress. When tomato plants are exposed to ambient day/night temperatures that exceed 32°C/20°C respectively during the reproductive phase, fruit set and fruit weight are reduced, leading to a significant decrease in yield. Processing tomato cultivars are cultivated in open fields, where environmental conditions are not controlled, therefore plants are exposed to multiple abiotic stresses, including heat stress. Nonetheless, information on stress response in processing tomatoes is very limited. Understanding the physiological response of modern processing tomato cultivars to heat stress may facilitate the development of thermotolerant cultivars. Here, we compared two tomato processing cultivars, H4107 and H9780, that we found to be constantly differing in yield performance. Using field and temperature-controlled greenhouse experiments, we show that the observed difference in yield is attributed to the occurrence of heat stress conditions. In addition, fruit-set and seed production were significantly higher in the thermotolerant cultivar H4107, compared with H9780. Despite the general acceptance of pollen viability as a measure of thermotolerance, there was no difference in the percentage of viable pollen between H4107 and H9780 under either of the conditions tested. In addition to observations of similar pollen germination and bud abscission rates, our results suggest that processing tomato cultivars may present a particular case, in which pollen performance is not determining reproductive thermotolerance. Our results also demonstrate the value of combining controlled and uncontrolled experimental settings, in order to validate and identify heat stress related responses, thus facilitating the development of thermotolerant processing tomato cultivars.

Keywords: Stress response; Field conditions; Pollen quality (search for similar items in EconPapers)
Date: 2021
Note: View the original document on HAL open archive server: https://hal.inrae.fr/hal-03295878v1
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Published in AoB Plants, 2021, 13 (4), 9 p. ⟨10.1093/aobpla/plab046⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-03295878

DOI: 10.1093/aobpla/plab046

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