四川农业大学学报
四川農業大學學報
사천농업대학학보
JOURNAL OF SICHUAN AGRICULTURAL UNIVERSITY
2014年
3期
270-276
,共7页
海拔梯度%湿地植物%光合作用%叶绿素荧光参数
海拔梯度%濕地植物%光閤作用%葉綠素熒光參數
해발제도%습지식물%광합작용%협록소형광삼수
altitudinal gradient%hydrophytes%photosynthesis%chlorophyll fluorescence parameters
【目的】将生长于纳帕海高原湿地的4种挺水植物即水葱(Scirpusvalidus)、荸荠(Heleocharisdulcis)、黑三棱(Sparganiumstoloniferum)和茭草(Zizanialatifolia)移栽至不同海拔生境中(3260 m,2437 m,1891 m),模拟全球气候变化,分析4种植物经移栽后叶绿素含量及叶绿素荧光动力学参数的变化,为湿地植物光合特性对气候变化响应提供参考。【方法】2012年5月,采用LI-6400便携式光合测定系统(Li-Cor Inc.,USA)对经过移栽后的4种湿地植物进行测定,同时实验室测定其叶绿素含量。【结果】经过移栽后的4种湿地植物中,茭草对环境变化最为敏感,在3个海拔梯度下均受到光抑制和低温等环境胁迫;荸荠对环境耐受性较强,在不同海拔环境中未见不良光合生理现象;水葱、黑三棱仅对海拔3260 m的环境表现出光抑制和低温胁迫等不良光合生理现象。【结论】4种湿地植物中荸荠的抗逆性最强,水葱和黑三棱次之,茭草最低。不同植物的光合生理差异性是自身生理因素和不同海拔下的环境因素共同作用的结果。
【目的】將生長于納帕海高原濕地的4種挺水植物即水蔥(Scirpusvalidus)、荸薺(Heleocharisdulcis)、黑三稜(Sparganiumstoloniferum)和茭草(Zizanialatifolia)移栽至不同海拔生境中(3260 m,2437 m,1891 m),模擬全毬氣候變化,分析4種植物經移栽後葉綠素含量及葉綠素熒光動力學參數的變化,為濕地植物光閤特性對氣候變化響應提供參攷。【方法】2012年5月,採用LI-6400便攜式光閤測定繫統(Li-Cor Inc.,USA)對經過移栽後的4種濕地植物進行測定,同時實驗室測定其葉綠素含量。【結果】經過移栽後的4種濕地植物中,茭草對環境變化最為敏感,在3箇海拔梯度下均受到光抑製和低溫等環境脅迫;荸薺對環境耐受性較彊,在不同海拔環境中未見不良光閤生理現象;水蔥、黑三稜僅對海拔3260 m的環境錶現齣光抑製和低溫脅迫等不良光閤生理現象。【結論】4種濕地植物中荸薺的抗逆性最彊,水蔥和黑三稜次之,茭草最低。不同植物的光閤生理差異性是自身生理因素和不同海拔下的環境因素共同作用的結果。
【목적】장생장우납파해고원습지적4충정수식물즉수총(Scirpusvalidus)、발제(Heleocharisdulcis)、흑삼릉(Sparganiumstoloniferum)화교초(Zizanialatifolia)이재지불동해발생경중(3260 m,2437 m,1891 m),모의전구기후변화,분석4충식물경이재후협록소함량급협록소형광동역학삼수적변화,위습지식물광합특성대기후변화향응제공삼고。【방법】2012년5월,채용LI-6400편휴식광합측정계통(Li-Cor Inc.,USA)대경과이재후적4충습지식물진행측정,동시실험실측정기협록소함량。【결과】경과이재후적4충습지식물중,교초대배경변화최위민감,재3개해발제도하균수도광억제화저온등배경협박;발제대배경내수성교강,재불동해발배경중미견불량광합생리현상;수총、흑삼릉부대해발3260 m적배경표현출광억제화저온협박등불량광합생리현상。【결론】4충습지식물중발제적항역성최강,수총화흑삼릉차지,교초최저。불동식물적광합생리차이성시자신생리인소화불동해발하적배경인소공동작용적결과。
[Objective]Four kinds of emergent plants (Scirpus validus,Heleocharis dulcis, Sparganiumstoloniferum and Zizania latifolia)were transplanted to different altitudes (3 260 m,2 437 m and 1 891 m)on the Napahai plateau wetland.The contents of chlorophyll and chloro-phyll fluorescence parameters were measured.The results may provide a reference for photosyn-thetic characteristics of wetland plants in response to climatic change.[Method]The 4 kinds of wetland plants were examined with LI-6400 (Li-Cor Inc.,USA)portable photosynthesis system in May 2012.Additionally,the chlorophyll contents of 4 kinds of plants were measured in labora-tory.[Results]Among 4 kinds of wetland plants,Z.latifolia was more sensitive to environmen-tal change compared to other three plants.All of them were restrained by light and low tempera-ture stresses in the different altitudes.H.dulcis had strong tolerance to environmental chagne and no undesirable photosynthetic or physiological phenomena were observed.S.validus and S. stoloniferum had undesirable photosynthetic and physiological phenomena in response to light suppression and low temperature at 3 260 m.[Conclusion]Among 4 kinds of wetland plants,H. dulcis had the strongest resistance,followed by S.validus and S.stoloniferum,Z.latifolia was the last one.The differences in photosynthetic characteristics among different plants were attribu-ted to both physiological and environmental factors.