华南农业大学学报
華南農業大學學報
화남농업대학학보
JOURNAL OF SOUTH CHINA AGRICULTURAL UNIVERSITY
2013年
4期
548-552
,共5页
郭淑红%薛立%杨振意%张柔
郭淑紅%薛立%楊振意%張柔
곽숙홍%설립%양진의%장유
水淹胁迫%幼苗%气体交换参数%主成分分析
水淹脅迫%幼苗%氣體交換參數%主成分分析
수엄협박%유묘%기체교환삼수%주성분분석
waterlogging stress%seedling%gas exchange parameter%analysis of principal component
对乐昌含笑Michelia chapensis、红荷Schima wallichii、红苞木Rhodoleia championii和樟树Cinnamomum camphora幼苗在根部淹水胁迫下的叶片气体交换参数进行了研究,以便从光合生理角度了解这4种树种的耐水淹生理机制.结果表明,随着水淹胁迫时间的增加,4种幼苗的净光合速率均呈下降趋势,35 d 时均达到最小值,分别为1.87、0.43、-0.26和0.62μmol· m-2· s-1;4种幼苗的叶片气孔导度和蒸腾速率均呈下降趋势,35 d 时4种幼苗的气孔导度分别为0.032、0.005、0.008和0.006 mol · m-2· s-1,蒸腾速率分别为0.04、0.13、0.02和0.10 mmol· m-2· s-1;乐昌含笑、红荷和樟树的细胞间隙CO2摩尔分数先降后升,而红苞木的细胞间隙CO2摩尔分数持续上升;由主成分分析法得出4种幼苗耐水淹能力为乐昌含笑>红荷>樟树>红苞木.
對樂昌含笑Michelia chapensis、紅荷Schima wallichii、紅苞木Rhodoleia championii和樟樹Cinnamomum camphora幼苗在根部淹水脅迫下的葉片氣體交換參數進行瞭研究,以便從光閤生理角度瞭解這4種樹種的耐水淹生理機製.結果錶明,隨著水淹脅迫時間的增加,4種幼苗的淨光閤速率均呈下降趨勢,35 d 時均達到最小值,分彆為1.87、0.43、-0.26和0.62μmol· m-2· s-1;4種幼苗的葉片氣孔導度和蒸騰速率均呈下降趨勢,35 d 時4種幼苗的氣孔導度分彆為0.032、0.005、0.008和0.006 mol · m-2· s-1,蒸騰速率分彆為0.04、0.13、0.02和0.10 mmol· m-2· s-1;樂昌含笑、紅荷和樟樹的細胞間隙CO2摩爾分數先降後升,而紅苞木的細胞間隙CO2摩爾分數持續上升;由主成分分析法得齣4種幼苗耐水淹能力為樂昌含笑>紅荷>樟樹>紅苞木.
대악창함소Michelia chapensis、홍하Schima wallichii、홍포목Rhodoleia championii화장수Cinnamomum camphora유묘재근부엄수협박하적협편기체교환삼수진행료연구,이편종광합생리각도료해저4충수충적내수엄생리궤제.결과표명,수착수엄협박시간적증가,4충유묘적정광합속솔균정하강추세,35 d 시균체도최소치,분별위1.87、0.43、-0.26화0.62μmol· m-2· s-1;4충유묘적협편기공도도화증등속솔균정하강추세,35 d 시4충유묘적기공도도분별위0.032、0.005、0.008화0.006 mol · m-2· s-1,증등속솔분별위0.04、0.13、0.02화0.10 mmol· m-2· s-1;악창함소、홍하화장수적세포간극CO2마이분수선강후승,이홍포목적세포간극CO2마이분수지속상승;유주성분분석법득출4충유묘내수엄능력위악창함소>홍하>장수>홍포목.
Effects of waterlogging stress on leaf gas exchange of Michelia chapensis, Schima wallichii, Rh-odoleia championii and Cinnamomum camphora were investigated so as to understand the physiological mechanism of waterlogging resistance of these four kind seedlings and provide a reference for the selection of waterlogging resistant species in southern China .The results showed that net photosynthetic rate ( Pn) of the four kind seedlings tended to decrease with increasing waterlogging time .Pn of M.chapensis, S. wallichii, R.championii and C.camphora reached their minimum with values of 1.87, 0.43, -0.26 and 0.62 μmol· m-2 · s-1 , respectively, in 35 days under waterlogging stress , and their stomatal con-ductance (Gs) tended to decrease with values of 0.032, 0.005, 0.008 and 0.006 mol· m-2· s-1, re-spectively, in 35 days under waterlogging stress;intercellular mole fraction of CO2(xCO2) of M.chapen-sis,S.wallichii and C.camphora decreased followed by an increase , whereas xCO2 of R.championii con-tinuously increased;with increasing waterlogging time , transpiration rate ( Tr) of M.chapensis, S.walli-chii, R.championii and C.camphora tended to decrease with values of 0.04, 0.13, 0.02, 0.10 mmol· m-2 · s-1 , respectively , in 35 days under waterlogging stress .The waterlogging resistance of the four kind seedlings was evaluated using principal component analysis , and the order of waterlogging re-sistance was M.chapensis >S.wallichii >C.camphora >R.championii.