?LCi-T便攜式光合儀
LCi-T 便攜式光合儀是小巧、輕便的便攜式光合作用測定儀,用以測量植物葉片的光合速率、蒸騰速率、氣孔導(dǎo)度等與植物光合作用相關(guān)的參數(shù)。儀器應(yīng)用IRGA(紅外氣體分析)原理,精密測量葉片表面CO2濃度及水分的變化情況來考察葉片與植物光合作用相關(guān)的參數(shù)。特殊的設(shè)計可在高濕度、高塵埃環(huán)境使用。既可在研究中使用,又是很好的教學(xué)儀器。

上圖左為全套光合儀主機配件及便攜箱等,上圖中為光合儀主機和手柄,上圖右為操作人員進行野外實驗

應(yīng)用領(lǐng)域
植物光合生理研究
植物抗脅迫研究
碳源碳匯研究
植物對氣候變化的相應(yīng)及其機理
作物新品種篩選
技術(shù)特點
配備手持式葉綠素?zé)晒鈨x,內(nèi)置了所有通用葉綠素?zé)晒夥治鰧嶒灣绦?,包括兩套熒光淬滅分析程序?套光響應(yīng)曲線程序、OJIP-test等
彩色觸摸屏,根據(jù)環(huán)境光線自動調(diào)整亮度
任選RGB或白色光源作為標(biāo)配
便攜式設(shè)計,體積輕巧,僅重2Kg
微型IRGA置于測量手柄中,大大縮短CO2測量的反應(yīng)時間
可在惡劣環(huán)境下使用
可方便互換不同種類的葉室
葉室材料經(jīng)精心選擇,以確保CO2及水分的測量精度
數(shù)據(jù)存儲量大,采用即插即拔SD卡
操作簡單,維護方便,葉室所有區(qū)域都很容易清潔
采用低能耗技術(shù),野外單電池持續(xù)工作時間可達10小時
內(nèi)置GPS

上圖為英國劍橋大學(xué)植物科學(xué)系M. Davey博士在南極洲對藻類光合作用研究時的工作圖片,因LC系列光合儀輕便小巧,堅固耐用,續(xù)航持久等特點被列為。
技術(shù)指標(biāo)
測量參數(shù):光合速率、蒸騰速率、胞間CO2濃度、氣孔導(dǎo)度、葉片溫度、葉室溫度、光合有效輻射、氣壓、光響應(yīng)曲線等
l 手持葉綠素?zé)晒鈨x(選配)
1. 測量參數(shù)包括F0、Ft、Fm、Fm’、QY_Ln、QY_Dn、NPQ、Qp、Rfd、RAR、Area、M0、Sm、PI、ABS/RC等50多個葉綠素?zé)晒鈪?shù),及3種給光程序的光響應(yīng)曲線、2種熒光淬滅曲線、OJIP曲線等
2. 高時間分辨率,可達10萬次每秒,自動繪出OJIP曲線并給出26個OJIP-test測量參數(shù)包括F0、Fj、Fi、Fm、Fv、Vj、Vi、Fm/F0、Fv/F0、Fv/Fm、M0、Area、Fix Area、Sm、Ss、N、Phi_P0、Psi_0、Phi_E0、Phi-D0、Phi_Pav、PI_Abs、ABS/RC、TR0/RC、ET0/RC、DI0/RC等
CO2測量范圍:0-2000ppm
CO2測量分辨率:1ppm
CO2采用紅外分析系統(tǒng),差分開路測量系統(tǒng),自動置零,自動氣壓和溫度補償

H2O測量范圍:0-75
mbar
H2O測量分辨率:0.1mbar
H2O測量采用雙激光調(diào)諧快速響應(yīng)水蒸氣傳感器
PAR測量范圍:0-3000μmol m-2 s-1
葉室溫度:-5 - 50℃ 精度:±0.2℃
葉片溫度:-5 - 50℃
葉室中空氣流量:68 – 340 ml / min
空氣流量精度:全量程的±2%
預(yù)熱時間:20℃時5分鐘
數(shù)據(jù)存儲:SD卡,支持32GB擴展,可存儲16,000,000組典型數(shù)據(jù)
數(shù)據(jù)接口:mini-USB接口,RS232標(biāo)準(zhǔn)接口
圖形顯示:可實時圖形顯示各測量參數(shù)
可選配便攜式光源:具有PLU控制單元,控光范圍0-2400 μmol m-2 s-1
可選配葉室
1. 寬葉葉室:長×寬為2.5×2.5cm,適用于闊葉及大多數(shù)葉片類型
2. 窄葉葉室:長×寬為5.8×1cm,適用寬度小于1cm的條形葉
3. 針葉葉室:長約69mm,直徑47mm,適用于簇狀針葉(白光光源)
4. 小型葉葉室:葉室直徑為16.5mm,測量面積2.16cm2
5. 土壤呼吸/小型植物室:測量測量土壤呼吸,或者高度低于55mm的整株草本植物光合作用,底面直徑為11cm
6. 多功能測量室:長×寬×高為15×15×7cm,分為上下兩部分,上部測量小型植物光合作用,下部分測量土壤呼吸
7. 果實測量室:上下兩部分組成,上部透明,下部為金屬,可測量果實直徑為11cm,高度為11.5cm
8. 冠層測量室:底面直徑12.7cm,高12.2cm,適用于地表冠層
9. 熒光儀聯(lián)用適配器:適用于連接多種葉綠素?zé)晒鈨x

上圖從左到右依次為寬葉室、窄葉室、LED光源、熒光儀聯(lián)用葉室、小型葉室

供電系統(tǒng):內(nèi)置12V 2.8AH鉛酸電池,可持續(xù)工作10小時左右
操作環(huán)境:5到45℃
主機尺寸:240×125×140mm,2.4Kg
主機顯示參數(shù):環(huán)境CO2和水蒸汽;CO2和水蒸汽變化;葉室和葉片的溫度;氣流速率;大氣壓;光合有效輻射;光合速率;胞間CO2濃度;蒸騰速率;氣孔導(dǎo)度;電池狀態(tài)等
典型應(yīng)用
Leaf life span optimizes annual biomass production rather than plant photosynthetic capacity in an evergreen shrub, Marty C. et al. 2010, New Phytologist, 187(2): 407-416


本文研究了Rhododendron ferrugineum(高山玫瑰杜鵑,杜鵑屬模式種)凈光合能力與葉片壽命的關(guān)系,發(fā)現(xiàn)有更多較老葉片的種群其光合能力更強(圖中深色區(qū)域為一年葉片和二年葉片)。
產(chǎn)地:英國
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