講演詳細

生理部門[Tree Physiology]

日付	2026年3月17日
開始時刻	ポスター発表
会場名	多目的ホール
講演番号	PG-10
発表題目	Screening Diverse Cryptomeria japonica Genotypes for Drought Tolerance Based on Photosynthetic and Its Related Traits Screening Diverse Cryptomeria japonica Genotypes for Drought Tolerance Based on Photosynthetic and Its Related Traits
所属	Kyoto University
要旨本文	Increasing drought intensity and frequency under climate change threaten forest productivity, heightening demand for drought-tolerant tree genotypes. Cryptomeria japonica shows substantial intraspecific variation in drought responses, but underlying mechanisms remain unclear. We evaluated drought responses of leaf photosynthetic and related traits across 80 genotypes from Tohoku to Kyushu in a greenhouse experiment. One-year-old cuttings were grown under well-watered (control) or drought-stress conditions. After 14_16 days without irrigation, we measured net photosynthesis, stomatal and cuticular conductance, and water-use efficiency. Drought reduced photosynthesis and stomatal conductance while increasing water-use efficiency. Mixed-model analyses revealed significant genetic variation and high heritability, indicating strong potential to improve drought tolerance in Cryptomeria japonica.
著者氏名	○Kurniawan, Wisnu Mukhlas Dwi1 ・ Konrai, Kaede1 ・ Suhara, Kento1 ・ Tobita, Hiroyuki2 ・ Nose, Mine3 ・ Nagano, Soichiro3 ・ Matsushita, Michinari3 ・ Takashima, Yuya3 ・ Kamei, Hiroaki3,1 ・ Hirao, Tomonori3 ・ Onoda, Yusuke1
著者所属	1Graduate School of Agriculture, Kyoto University ・ 2Forestry and Forest Products Research Institute ・ 3Forest Tree Breeding Center, Forestry and Forest Products Research Institute
キーワード	Drought Tolerance, Photosynthesis, Cryptomeria japonica
Key word	Drought Tolerance, Photosynthesis, Cryptomeria japonica