Heterophyllous Shoots of Japanese Larch Trees: The Seasonal and Yearly Variation in CO2 Assimilation Capacity of the Canopy Top with Changing Environment

Kitaoka, Satoshi; Laiye, Qu; Watanabe, Yoko; Watanabe, Makoto; Watanabe, Toshihiro; Koike, Takayoshi

Heterophyllous Shoots of Japanese Larch Trees: The Seasonal and Yearly Variation in CO2 Assimilation Capacity of the Canopy Top with Changing Environment

Kitaoka, Satoshi; Laiye, Qu; Watanabe, Yoko et al.

Plants-basel, 2020, 9(10), 1278

Permalink : https://hdl.handle.net/2115/79996

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https://doi.org/10.3390/plants9101278			24

論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/79996
タイトル	Heterophyllous Shoots of Japanese Larch Trees: The Seasonal and Yearly Variation in CO2 Assimilation Capacity of the Canopy Top with Changing Environment
著者	Kitaoka, Satoshi ; Laiye, Qu ; Watanabe, Yoko ; Watanabe, Makoto ; Watanabe, Toshihiro ; Koike, Takayoshi
著者名 Kitaoka, Satoshi
著者名 Laiye, Qu
著者名 Watanabe, Yoko
著者名 Watanabe, Makoto
著者名 Watanabe, Toshihiro
e-Rad_Researcher 10270919 著者名 Koike, Takayoshi
言語	英語
キーワード	Japanese larch (Larix kaempferi)
	P-sat-N relation
	V-cmax-N
	J(max)-N
	heterophyllous shoots
	nitrogen remobilization rate
	year-to-year variation
発行日	2020-10
出版者	MDPI
収録物名	Plants-basel
巻(号)	9(10)
ページ	1278
抄録	Japanese larch (Larix kaempferi = L. leptolepis) is often characterized by its high growth rate with heterophyllous shoots, but the functional differences of heterophyllous shoots still remain unclear. Recently, abrupt high temperature and drought during spring induced high photosynthetic rate via change in leaf morphology of the deciduous habit. In order to reveal the photosynthetic characteristics of both short and long-shoot needles of sunny canopy of the larch trees using a canopy tower, we calculated the seasonal change of gas exchange characters and leaf mass per area (LMA) and foliar nitrogen content (N) of heterophyllous needles: short and long-shoot needles over 3 years. No marked difference in light-saturated photosynthetic rates (P-sat) was observed between short and long shoots after leaf maturation to yellowing, although the difference was obvious in a specific year, which only shows that seasonal change in temperature and soil moisture determines the in situ photosynthetic capacity of needles. The large annual and seasonal variations in P-sat in both shoots were found to be mainly determined by climatic variations, while shoot types determined the strategy of their photosynthetic N utilization as well as the stomatal regulation.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/plants9101278