Photosyn thetic Ecophysiolog ica l Respon ses of D ifferent Azadirach taindica Provenances to Change of Tempera ture

ZHENG Yi-xing; PENG Xing-min; ZHANG Yan-ping

Under the ambient atmospheric CO2 370 ±10 μmol ·mol-1 , 65% ±5% relative humidity and PAR( Photosynthetically Available Radiation) of 400, 800 and 1 200 μmol·m-2 ·s-1 , the temperature dependence ofnet photosynthetic rate ( Pn) , stomatal conductance ( gi) , transp iration rate ( E) , photosynthesis resp iration ( Pr) anddark resp iration (Rd) of 4 p rovenances of Azadirach ta indica were measured with Li26400 Portable Photosynthesis(Li2Cor Inc. ,USA). The results showed thatwith the increase of temperature, the Pn showed sharp parabolic curveresponse. The op timum temperature of Pn was different in each growing season. In the initiation phase ( from Feb.toMay) , the op timum temperature of Pn was around 28229 ℃, 32 ℃ in the p rosperous phase ( from Jun to Sep t. ) ,30 ℃ in the last phase ( from Oct. to Jan. ). Under the same experimental condition, for the same p rovenance, thePn of p rosperous phase was higher than that of initiation phase and last phase , and for the different p rovenances,the Pn of p rovenance Kalyaniwas far higher than that of the others. With the increase of temperature, the gi and Eshowed exponential curve response in the initiation phase and last phase, and linear pattern response in thep rosperous phase. Under the same experimental condition, the gi and E of p rovenance Kalyaniwas higher than that of the others. The Pr and Rd showed exponential curve response to increase of temperature. Under the sametemperature condition, the Rd was higher than Pr. For the different growing seasons, the Pr and Rd of the initiationphase was higher than that of the other phases, and for the same growing phase, the Pr and Rd of p rovenanceKalyani was the highest, and that of p rovenance Kulapachta was the lowest.

1. Research Institute of Resource Insects, CAF, Kunming 650224, Yunnan, China

Received Date: 2007-07-30

Abstract: Under the ambient atmospheric CO2 370 ±10 μmol ·mol-1 , 65% ±5% relative humidity and PAR( Photosynthetically Available Radiation) of 400, 800 and 1 200 μmol·m-2 ·s-1 , the temperature dependence ofnet photosynthetic rate ( Pn) , stomatal conductance ( gi) , transp iration rate ( E) , photosynthesis resp iration ( Pr) anddark resp iration (Rd) of 4 p rovenances of Azadirach ta indica were measured with Li26400 Portable Photosynthesis(Li2Cor Inc. ,USA). The results showed thatwith the increase of temperature, the Pn showed sharp parabolic curveresponse. The op timum temperature of Pn was different in each growing season. In the initiation phase ( from Feb.toMay) , the op timum temperature of Pn was around 28229 ℃, 32 ℃ in the p rosperous phase ( from Jun to Sep t. ) ,30 ℃ in the last phase ( from Oct. to Jan. ). Under the same experimental condition, for the same p rovenance, thePn of p rosperous phase was higher than that of initiation phase and last phase , and for the different p rovenances,the Pn of p rovenance Kalyaniwas far higher than that of the others. With the increase of temperature, the gi and Eshowed exponential curve response in the initiation phase and last phase, and linear pattern response in thep rosperous phase. Under the same experimental condition, the gi and E of p rovenance Kalyaniwas higher than that of the others. The Pr and Rd showed exponential curve response to increase of temperature. Under the sametemperature condition, the Rd was higher than Pr. For the different growing seasons, the Pr and Rd of the initiationphase was higher than that of the other phases, and for the same growing phase, the Pr and Rd of p rovenanceKalyani was the highest, and that of p rovenance Kulapachta was the lowest.

HTML

Reference (10)

[1]	Ward J K, Strain B R. Elevated CO₂ studies: past, p resent and future[J]. Tree Physiol, 1999, 19: 211 - 220
[2]	Battaglia M, Beadle C, Loughhead S. Photosynthetic temperatureresponses of Eucalyptus globulus and Eucalyptus nitens [J]. TreePhysiology, 1996, 16: 81 - 89
[3]	项文化,田大伦,闫文德. 白栎光合特性对二氧化碳浓度增加和温度升高的响应[J]. 浙江林学院学报, 2004, 21 (3) : 247 - 253
[4]	张小全,徐德应. 温度对杉木中龄林针叶光合生理生态的影响[J]. 林业科学, 2002, 38 (3) : 27 - 33
[5]	Schmutterer H. The Neem Tree[M]. Germary : VCH Verlagsgesell2schaftmbH, 1995
[6]	彭兴民,张燕平,赖永祺,等. 印楝生物学特性及引种栽培[J]. 林业科学研究, 2003, 16 (1) : 75 - 80
[7]	Henry H A L,Aarssen LW. On the relationship between shade toler2ance and shade avoidance strategies in woodland p lants[J]. Oikos,1997, 80 (3) : 575 - 582
[8]	Leuning R. A critical app raisal of a combined stomatal2photosynthe2sismodel for C3 p lants [J]. Plant Cell & Environ, 1995, 18:339 - 355
[9]	Kozlowski T T, Kramer P J, Pallardy S G. The physiological ecologyof woody p lants[M]. New York: Academic Press, 1991
[10]	HagiharaA, Hozumi K. Resp iration[M] / /Raghavendra A S. Physi2ology of Trees. New York: JohnWiley & Sons, INC, 1991: 87 - 110

Photosyn thetic Ecophysiolog ica l Respon ses of D ifferent Azadirach taindica Provenances to Change of Tempera ture

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views