Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species

Exposure to high-temperature stress (HTS) during early regeneration in plants can profoundly shape seed germination, seedling growth, and development, thereby providing stress resilience. In this study, we assessed how the timing of HTS, which was implemented as 8 h in 40°C, could affect the early r...

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Autores principales:	Chuangwei Fang, Huayang Chen, Diana Castillo-Díaz, Bin Wen, Kun-Fang Cao, Uromi Manage Goodale
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	heat stress Ficus plant hormones seed and seedling climate change Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/d7a3aea8de9c4c1d91fe9e305c385f37
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spelling	oai:doaj.org-article:d7a3aea8de9c4c1d91fe9e305c385f372021-12-01T12:50:16ZRegeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species1664-462X10.3389/fpls.2021.754207https://doaj.org/article/d7a3aea8de9c4c1d91fe9e305c385f372021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.754207/fullhttps://doaj.org/toc/1664-462XExposure to high-temperature stress (HTS) during early regeneration in plants can profoundly shape seed germination, seedling growth, and development, thereby providing stress resilience. In this study, we assessed how the timing of HTS, which was implemented as 8 h in 40°C, could affect the early regeneration stages and phytohormone concentration of four hemiepiphytic (Hs) and four non-hemiepiphytic (NHs) Ficus species. Their seed germination, seedling emergence, and seedling survival probabilities and the concentrations of three endogenous phytohormones, abscisic acid (ABA), indole-3-acetic acid (IAA), and salicylic acid (SA) were assessed after HTS imposed during imbibition, germination, and emergence. In both groups, seeds were more sensitive to HTS in the early regeneration process; stress experienced during imbibition affected emergence and survival, and stress experienced during germination affected subsequent emergence. There was no effect from HTS when received after emergence. Survival was highest in hemiepiphytes regardless of the HTS treatment. The phytohormones showed growth form- and regeneration stage-specific responses to HTS. Due to the HTS treatment, both SA and ABA levels decreased in non-hemiepiphytes during imbibition and germination; during germination, IAA increased in hemiepiphytes but was reduced in non-hemiepiphytes. Due to the HTS treatment experienced during emergence ABA and IAA concentrations were greater for hemiepiphytes but an opposite effect was seen in the two growth forms for the SA concentration. Our study showed that the two growth forms have different strategies for regulating their growth and development in the early regeneration stages in order to respond to HTS. The ability to respond to HTS is an ecologically important functional trait that allows plant species to appropriately time their seed germination and seedling development. Flexibility in modulating species regeneration in response to HTS in these subtropical and tropical Ficus species could provide greater community resilience under climate change.Chuangwei FangHuayang ChenHuayang ChenHuayang ChenHuayang ChenDiana Castillo-DíazDiana Castillo-DíazDiana Castillo-DíazBin WenKun-Fang CaoKun-Fang CaoUromi Manage GoodaleUromi Manage GoodaleUromi Manage GoodaleFrontiers Media S.A.articleheat stressFicusplant hormonesseed and seedlingclimate changePlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heat stress Ficus plant hormones seed and seedling climate change Plant culture SB1-1110
spellingShingle	heat stress Ficus plant hormones seed and seedling climate change Plant culture SB1-1110 Chuangwei Fang Huayang Chen Huayang Chen Huayang Chen Huayang Chen Diana Castillo-Díaz Diana Castillo-Díaz Diana Castillo-Díaz Bin Wen Kun-Fang Cao Kun-Fang Cao Uromi Manage Goodale Uromi Manage Goodale Uromi Manage Goodale Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species
description	Exposure to high-temperature stress (HTS) during early regeneration in plants can profoundly shape seed germination, seedling growth, and development, thereby providing stress resilience. In this study, we assessed how the timing of HTS, which was implemented as 8 h in 40°C, could affect the early regeneration stages and phytohormone concentration of four hemiepiphytic (Hs) and four non-hemiepiphytic (NHs) Ficus species. Their seed germination, seedling emergence, and seedling survival probabilities and the concentrations of three endogenous phytohormones, abscisic acid (ABA), indole-3-acetic acid (IAA), and salicylic acid (SA) were assessed after HTS imposed during imbibition, germination, and emergence. In both groups, seeds were more sensitive to HTS in the early regeneration process; stress experienced during imbibition affected emergence and survival, and stress experienced during germination affected subsequent emergence. There was no effect from HTS when received after emergence. Survival was highest in hemiepiphytes regardless of the HTS treatment. The phytohormones showed growth form- and regeneration stage-specific responses to HTS. Due to the HTS treatment, both SA and ABA levels decreased in non-hemiepiphytes during imbibition and germination; during germination, IAA increased in hemiepiphytes but was reduced in non-hemiepiphytes. Due to the HTS treatment experienced during emergence ABA and IAA concentrations were greater for hemiepiphytes but an opposite effect was seen in the two growth forms for the SA concentration. Our study showed that the two growth forms have different strategies for regulating their growth and development in the early regeneration stages in order to respond to HTS. The ability to respond to HTS is an ecologically important functional trait that allows plant species to appropriately time their seed germination and seedling development. Flexibility in modulating species regeneration in response to HTS in these subtropical and tropical Ficus species could provide greater community resilience under climate change.
format	article
author	Chuangwei Fang Huayang Chen Huayang Chen Huayang Chen Huayang Chen Diana Castillo-Díaz Diana Castillo-Díaz Diana Castillo-Díaz Bin Wen Kun-Fang Cao Kun-Fang Cao Uromi Manage Goodale Uromi Manage Goodale Uromi Manage Goodale
author_facet	Chuangwei Fang Huayang Chen Huayang Chen Huayang Chen Huayang Chen Diana Castillo-Díaz Diana Castillo-Díaz Diana Castillo-Díaz Bin Wen Kun-Fang Cao Kun-Fang Cao Uromi Manage Goodale Uromi Manage Goodale Uromi Manage Goodale
author_sort	Chuangwei Fang
title	Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species
title_short	Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species
title_full	Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species
title_fullStr	Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species
title_full_unstemmed	Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species
title_sort	regeneration and endogenous phytohormone responses to high-temperature stress drive recruitment success in hemiepiphytic fig species
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/d7a3aea8de9c4c1d91fe9e305c385f37
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Regeneration and Endogenous Phytohormone Responses to High-Temperature Stress Drive Recruitment Success in Hemiepiphytic Fig Species

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