Changes of Phenylalanine Ammonia-Lyase(PAL) Activity in Twig Tissues of Two Diospyros Species during Cold Acclimation.
スポンサーリンク
概要
- 論文の詳細を見る
Changes of phenylalanine ammonia-lyase (PAL) activity in 1-year-old twigs of <I>D. taitoensis</I> and <I>D. kaki</I> were investigated with reference to the cold acclimation from autumn to winter. Low temperature exotherms (LTE) of twig pieces in <I>D. taitoensis</I> were found by differential thermal analysis (DTA) at -14.5--15.5°C in Aug. to Nov., and at -18°C in early Jan. While in 4 cultivars of <I>D. kaki</I>, LTE occurred at -16--19°C in early Sept., and found at -29.2°C for 'Mapang, ' at -26.4--27.5°C for other Japanese cultivars in early Jan. PAL activities in bud, cortex and xylem of <I>D. kaki</I> ('Fuyu') twigs gradually increased from Oct., and the highest activity was found in Dec. In <I>D. taitoensis</I>, PAL activity was relatively lower than in <I>D. kaki</I>, however, the peak activities were found in the bud and cortical tissues during the coldest part of the season. PAL activities in cortical and xylem tissues of both species increased under chilling treatment (4°C, 8h photoperiod) in early autumn. Particularly the higher activities were found in cortical tissues of kaki at 7th day and the chilling treatment lowered electrolite leakage of twigs by more than 20% in Sept. and 10% in Oct. Thus, an apparent difference was found in the ability of cold acclimation between 2 <I>Diospyros</I> species. <I>D. kaki</I> seems to have evolved the ability of cold acclimation by controlling the enzyme systems related with production of phenolic substances according to the environmental temperatures.
- 日本生物環境工学会の論文
日本生物環境工学会 | 論文
- 温室における燃焼式蓄熱型二酸化炭素施肥システムの省エネルギー性・環境負荷低減性・経済性評価
- 高濃度培養液を用いる高糖度トマト生産に適した循環キャピラリー栽培システムの開発
- 2種のUV励起光によるラッカセイ生葉のLIFスペクトル変化および蛍光葉内分布
- ナメコ子実体の光形態形成過程における発現遺伝子の解析
- 光の波長と環境温度がナメコの生体電位および形態形成に及ぼす影響