气候变化领域集成服务门户(CCPortal): Responses to drought stress in Prunus sargentii and Larix kaempferi seedlings using morphological and physiological parameters

CCPortal

DOI	10.1016/j.foreco.2020.118099
	Responses to drought stress in Prunus sargentii and Larix kaempferi seedlings using morphological and physiological parameters
	Bhusal N.; Lee M.; Reum Han A.; Han A.; Kim H.S.
发表日期	2020
ISSN	0378-1127
卷号	465
英文摘要	The frequency and severity of drought are expected to increase due to climate change; therefore, drought tolerance of tree species should be considered before planting for maximal survival in the field. In this study, we examined the response of drought stress in two of the most popular plantation species: Sargent cherry (Prunus sargentii) and Japanese larch (Larix kaempferi) based on the morphological and physiological characteristics. These plantation species are widely planted in central and northern Asia, especially in Japan and Korea, and also widely used for plantation purpose in northern Europe. Three different irrigation regimes of control (CT; 100% precipitation (P)), light drought (LD; 40% reduction of P), and heavy drought (HD; 80% reduction of P) were applied at the experimental site of Mt. Jiri, the Republic of Korea. For morphological responses, both species experienced a significant decrease in leaf size in drought conditions; however, Sargent cherry and Japanese larch experienced reduced leaf width and length, respectively. On the other hand, leaf mass area (LMA, g cm−2) increased and branch growth decreased in both species under drought conditions. As physiological responses, drought stress significantly decreased maximum photosynthesis rate (Amax) and electron transfer rate (Jmax) for both species, while stomatal conductance (Gs) at Amax significantly decreased only in Sargent cherry. Drought significantly reduced predawn (ΨPD), midday leaf water potential (ΨMD), and transpiration in Sargent cherry but not in Japanese larch. In mid-summer, carbon isotopic composition (δ13C) significantly decreased in Sargent cherry but only showed a reduction tendency in Japanese larch. However, the changes of δ13C were not significant in early summer or mid-fall. In the present study, both species showed isohydric and anisohydric characteristics, but Sargent cherry showed greater anisohydric behavior with a steeper slope (Y = 2.132X) and Japanese larch showed more isohydric behavior with a shallower slope (Y = 1.722X). Our results highlight that both species altered their morphological and physiological responses under drought stress; however, the Japanese larch showed greater resistance and resilience in morphological and physiological responses, and in plant-water relations. Therefore, Japanese larch would be more beneficial for plantations in water deficit regions than Sargent cherry. © 2020 Elsevier B.V.
关键词	Agronomy Climate change Drought Forestry Isotopes Physiology Plants (botany)Transpiration Anisohydric/isohydric behavior Larix kaempferi Leaf morphology Photosynthetic response Prunus sargentii Stable carbon isotopes Transpiration rates Physiological models carbon isotope drought stress fruit morphology photosynthesis physiological response transpiration Agronomy Drought Forestry Isotopes Physiology Transpiration South Korea Larix kaempferi Prunus sargentii Pseudolarix kaempferi
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132840
推荐引用方式 GB/T 7714	Bhusal N.,Lee M.,Reum Han A.,et al. Responses to drought stress in Prunus sargentii and Larix kaempferi seedlings using morphological and physiological parameters[J]. Forest Ecology and Management,2020,465.
APA	Bhusal N.,Lee M.,Reum Han A.,Han A.,&Kim H.S..(2020).Responses to drought stress in Prunus sargentii and Larix kaempferi seedlings using morphological and physiological parameters.,465.
MLA	Bhusal N.,et al."Responses to drought stress in Prunus sargentii and Larix kaempferi seedlings using morphological and physiological parameters".465(2020).