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Fang, Chuangwei [1], Chen, Huayang [2],, [3], Manage Goodale, Uromi [4].

Effect of extreme high temperature on Ficus regneration in southern China.

Ficus (Moraceae), plays a significant functional part in the tropical forestry ecosystem with diverse habits, relative relationship with plants and animals (Harrison & Shanahan, 2005), and many rare Ficus species structure the diversity in subtropical and tropical community (Harrison, 2005). But now, plants’ habitats, including subtropical and tropical forests, are facing many challenges because of anthropogenic influences and climate change. Climate change, which controls the patterns of temperature and precipitation, also has vital impact on plant recruitment. Because temperature and precipitation not only drive plant’s distribution, but also control seed dormancy and germination (Walck et al., 2011). Under the changed temperature and rain patterns, seed dormancy, seed germination and seedling germination may affected by the changed patterns, which will lead to a priority effects or delay effects of the germination and future plant growth (Walck et al., 2011, Singh et al., 2013, ten Brink et al., 2020). Plants will be more sensitive to climate change during their early development stage, like seed germination and seedling development. This becomes a major bottleneck to plant regeneration (Walck et al., 2011, Uriarte et al., 2018). Thus, the study of Ficus seeds for their regeneration, how their function and response to environmental stresses in different habits, are fundamental and meaningful for plant regeneration and plant physiology. To conduct the heat stress experiment on Ficus seeds and seedlings, eight Ficus species were selected and divided into two habits: hemiepiphytic species (Hs) and non-hemiepiphytic species (NHs) to suffer 40℃ temperature stress during their seed imbibition, seed germination and seedling emergence stages. Results showed that heat stress have different effects on the two habits of Ficus. NHs were more heat tolerance that Hs during seed germination and seedling emergence. But Hs had higher survival. For different species, they had their species-specific strategies to response heat stress. All NHs species were live better and the four Hs had quite different responses when they suffeedr heat stress during seed imbibition and seed germination stages. Fcius racemosa and Ficus microcarpa had better heat tolerance in different stages and Ficus microcarpa had the highest survival. Ficus auriculata and Ficus semicordata were the species favor heat stress.

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1 - Guangxi University, Forestry College, Daxuedonglu 100, Nanning, 45, 530004, China
2 - Institute Of Botany, The Chinese Academy Of Sciences, State Key Laboratory Of Vegetation And Environmental Change, No.20 Nanxincun, Xiangshan, Beijing, 100093, P.R. China, Beijing, 11, 100093, China
3 - Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan Province, 666303, China
4 - Guangxi University, Plant Ecophysiology And Evolution Group, State Key Laboratory Of Conservation And Utilization Of Subtropical Agro-bioresources, College Of Forestry,, Daxuedonglu 100, Nanning, 530005, China


Presentation Type: Oral Paper
Session: ECOPH1, Ecophysiology I
Location: /
Date: Monday, July 19th, 2021
Time: 11:30 AM(EDT)
Number: ECOPH1007
Abstract ID:274
Candidate for Awards:Physiological Section Physiological Section Li-COR Prize

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