‘欧美杨177’幼苗光合指标日变化分析
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摘要
文章利用Li-6400XT测定了欧美杨177幼苗净光合速率,研究其日变化与环境因子的关系。结果表明:欧美杨177净光合速率、蒸腾速率和气孔导度日变化均呈现"双峰"曲线,表现出明显的光合"午休"现象,中午净光合速率降低主要受气孔限制因素限制;净光合速率峰值出现在10:00时和14:00时,分别为27.55μmol·m~(-2)·s~(-1)和24.85μmol·m-2·s-1。14:00～18:00时段,胞间CO2浓度升高,气孔限制值减小,净光合速率下降主要受非气孔因素限制;欧美杨177净光合速率与气孔导度、光合有效辐射呈极显著正相关(r=0.973**、r=0.976**),与胞间CO2浓度呈极显著负相关(r=-0.918**),对蒸腾速率影响最大的是空气CO_2浓度。
In order to identify the relationship between diurnal variation of photosynthesis rate and environmental factors of P. × canadensis‘177', photosynthesis was measured by using portable LI-6400 photosynthesis system. The results showed that the diurnal variation of net photosynthetic rate,transpiration rate and stomatal conductance presented bimodal curve, showing obvious‘midday depression'phenomenon. The decrease of net photosynthetic rate was mainly caused by stomatal limitation. The net photosynthetic rate peaks were detected at 10:00 AM and 14:00 PM, which reached to27.55μmol·m~(-2)·s-1 and 24.85μmol·m~(-2)·s-1 respectively. The net photosynthetic rate of P. × canadensis‘177'had extremely significantly positive correlation with stomatal conductance(r=0.973**)and photosynthetically available radiation(r=0.976**), and had extremely significantly negatively correlated with intercellular CO_2 concentration(r=-0.918**). Air CO_2 concentration was major environmental factor influencing diurnal variation of transpiration rate.
In order to identify the relationship between diurnal variation of photosynthesis rate and environmental factors of P. × canadensis‘177', photosynthesis was measured by using portable LI-6400 photosynthesis system. The results showed that the diurnal variation of net photosynthetic rate,transpiration rate and stomatal conductance presented bimodal curve, showing obvious‘midday depression'phenomenon. The decrease of net photosynthetic rate was mainly caused by stomatal limitation. The net photosynthetic rate peaks were detected at 10:00 AM and 14:00 PM, which reached to27.55μmol·m~(-2)·s-1 and 24.85μmol·m~(-2)·s-1 respectively. The net photosynthetic rate of P. × canadensis‘177'had extremely significantly positive correlation with stomatal conductance(r=0.973**)and photosynthetically available radiation(r=0.976**), and had extremely significantly negatively correlated with intercellular CO_2 concentration(r=-0.918**). Air CO_2 concentration was major environmental factor influencing diurnal variation of transpiration rate.
引文
[1]李文文,黄秦军,丁昌俊.南方型和北方型美洲黑杨幼苗光合作用的日季节变化[J].林业科学研究,2010,23(2):227-233.
[2]万素梅,贾志宽,杨宝平.苜蓿光合速率日变化及其与环境因子的关系[J].草地学报,2009,17(1):27-31.
[3]李晓宇.‘渤丰1号’杨光合速率日变化及其与生理生态因子的关系[J].山东林业科技,2015(2):10-13.
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[5]杨晓玲,杨晴,郭守华,等.燕龙板栗光合作用及其相关因素的日变化[J].经济林研究,2008,26(1):67-70.
[6]李文文,黄秦军,丁昌俊,等.南方型和北方型美洲黑杨幼苗光合作用的日季节变化[J].林业科学研究,2010,23(2):227-233.
[7]栾金花.干旱胁迫下三江平原湿地毛苔草光合作用日变化特性研究[J].湿地科学,2008(02):223-228.
[8]刘巍,蔄胜军,丁勇,等.5种不同杨树光合指标日变化分析[J].西南林业大学学报,2015,35(6):19-25.
[9]王萍,聂东伶,柏文富,等.短梗大参叶片光合速率和叶绿素荧光参数日变化[J].经济林研究,2009,27(1):69-71.
[10]闫年,吴文友,刘桂华,等.四个杨树品系夏季光合作用日变化[J].林业科技开发,2011,25(2):48-52.
[11]夏诗书,李宏,程平,等.伊利地区不同引种杨树品系苗木光合日变化特性研究[J].安徽农业大学学报,2018,45(1):81-89.
[12] Yang J D, Liu Z M. Study on field-grown maize introduced into Tibetan plateau:Some characteristics of diurnal variation of photosynthesis[J]. Acta Agronomica Sinica,2002,28:475-479.
[13]许大全.光合作用气孔分析中的一些问题[J].植物生理学报,1997,33(4):241-244.
[14]郭天财,王之杰,王永华,等.不同穗型小麦品种旗叶光合作用日变化的研究[J].林西北植物学报,2002,22(3):554-560.
[2]万素梅,贾志宽,杨宝平.苜蓿光合速率日变化及其与环境因子的关系[J].草地学报,2009,17(1):27-31.
[3]李晓宇.‘渤丰1号’杨光合速率日变化及其与生理生态因子的关系[J].山东林业科技,2015(2):10-13.
[4]刘雅荣,刘奉觉.四种杨树苗木的生长与光合作用特性的研究[J].林业科学,1983,19(3):269-276.
[5]杨晓玲,杨晴,郭守华,等.燕龙板栗光合作用及其相关因素的日变化[J].经济林研究,2008,26(1):67-70.
[6]李文文,黄秦军,丁昌俊,等.南方型和北方型美洲黑杨幼苗光合作用的日季节变化[J].林业科学研究,2010,23(2):227-233.
[7]栾金花.干旱胁迫下三江平原湿地毛苔草光合作用日变化特性研究[J].湿地科学,2008(02):223-228.
[8]刘巍,蔄胜军,丁勇,等.5种不同杨树光合指标日变化分析[J].西南林业大学学报,2015,35(6):19-25.
[9]王萍,聂东伶,柏文富,等.短梗大参叶片光合速率和叶绿素荧光参数日变化[J].经济林研究,2009,27(1):69-71.
[10]闫年,吴文友,刘桂华,等.四个杨树品系夏季光合作用日变化[J].林业科技开发,2011,25(2):48-52.
[11]夏诗书,李宏,程平,等.伊利地区不同引种杨树品系苗木光合日变化特性研究[J].安徽农业大学学报,2018,45(1):81-89.
[12] Yang J D, Liu Z M. Study on field-grown maize introduced into Tibetan plateau:Some characteristics of diurnal variation of photosynthesis[J]. Acta Agronomica Sinica,2002,28:475-479.
[13]许大全.光合作用气孔分析中的一些问题[J].植物生理学报,1997,33(4):241-244.
[14]郭天财,王之杰,王永华,等.不同穗型小麦品种旗叶光合作用日变化的研究[J].林西北植物学报,2002,22(3):554-560.