Effects of soil water status on gas exchange of peanut and early rice leaves

Abstract

Abstract: The gas exchange characteristics of peanut and early rice leaves were investigated in experimental plots under different soil water conditions over a long growth period.The results showed that at the branching stage of peanut,the stomatal conductance(Gs)and transpiration rate(Tr)decreased slightly under mild and moderate soil water stress,while the net photosynthetic rate(Pn)and leaf water use efficiency (WUE) increased.The Gs/Tr ratio also increased under mild water stress,but decreased under moderate water stress.At podding stage,the Gs,Tr,Gs/Tr ratio and Pn decreased,while WUE increased significantly under mild and moderate water stress.The peanut was suffered from water stress at its pod setting stage.At the grain filling stage of early rice,the Gs,Tr and Gs/Tr ratio fluctuated insignificantly under mild and moderate water stress,while Pn and WUE increased significantly,with an increase in grain yield under mild water stress.It's suggested that the combination of Gs and Gs/Tr ratio could be a reference index for crop water stress,namely,crops could be hazarded by water stress when Gs and Gs/Tr decreased synchronously.

Key words: Peanut, Early rice, Transpiration rate, Stomatal conductance, Water stress

CLC Number:

S152.7

CHEN Jiazhou, L? Guoan, HE Yuanqiu . Effects of soil water status on gas exchange of peanut and early rice leaves [J]. Chinese Journal of Applied Ecology, 2005, 16(1): 105-110.

References

[1] ChenJ-Z(陈家宙), Chen M-L(陈明亮), He Y-Q(何圆球).2001.Effects of soil water condition and microclimate on transpiration rate of rice. Chin J Appl Ecol(应用生态学报), 12(1):63～67(in Chinese)
[2] Du Z-C(杜占池), Yang Z-G(杨宗贵). 1995. Comparative study on the characteristics of photosynthesis and transpiration in Aneurolepidium chinense. Acta Bot Sin (植物学报), 37 (1):66～73 (in Chinese)
[3] Gao J(高建), Hou C-L(侯成林), Wu Z-M(吴泽民).2000. Effect of flooding stress on transpiration of poplar I-65/55. Chin J Appl Ecol(应用生态学报), 11(4):518～522(nn Chinese)
[4] Huang W-J(黄文江),Wang J-H(王纪华),Zhao C-J(赵春江), et al. 2002. Studies on the physiological characteristics and water-saving mechanism at pregnancy stage of dry cultivation rice. Acta Agron Sin (作物报), 28(3):411～416(in Chinese)
[5] Jiang D-A(蒋德安), Xu Y-F(徐银发). 1996. Diurnal changes of photosynthetic rate, stomatal conductance and rubisco in rice leaf.Acta Phytophysiol Sin (植物生理学报), 22 (1):94～100 (in Chinese)
[6] Jing J-H(荆家海), Ma S-S(马书尚). 1990. Responses of gas exchange of leaves in maize, dry rice, cowpea and cotton to water stress. Acta Agron Sin (作物学报), 16 (4):342～347 (in Chinese)
[7] Kang S-Z(康绍忠), Liu X-M(刘晓明). 1993. Distribution of hydraulic resistance and water potential in soil-plant-atmosphere continuum during growing period of maize. Chin J Appl Ecol (应用生态学报), 4(3):260～266(in Chinese)
[8] Li J_Y(李吉跃),Zhou P(周平), Zhao L-J(招礼军). 2002. Influence of drought stress on transpiring water-consumption of seedlings. Acta Ecol Sin (生态报), 22(9):1380～1386(in Chinese)
[9] Liang Z-S(梁宗锁), Li X-Y(李新有), Kang S-Z(康绍忠). 1996.The relationship between stomatal conductance and photosynthetic rate in summer maize in water-saving irrigation. Agric Res Arid Areas(干旱地区农业研究), 14(1):101～105(in Chinese)
[10] Liao J-X(廖建雄), Wang G-X(王根轩). 2002. Effects of drought,CO₂ concentration and temperature increasing on photosynthesis rate, evapotranspiration, and water use efficiency of spring wheat.Chin J Appl Ecol (应用生态学报), 13 (5):547～550 (in Chinese)
[11] Sinclair TR, Hammond LC, Harrison J. 1998. Extractable soil water and transpiration rate of soybean on sandy soils. Agron J, 90:363～368.
[12] Sun G-Y(孙广玉),Zou Q(邹琦),Cheng B-S(程炳嵩), et al.1991. Responses of photosynthetic rate and stomatal conductance to water stress in soybean leaves. Acta Bot Sin (植物学报), 33(1):43～49(in Chinese)
[13] Wan S-Y(万善勇), Zhang G-Y(张高英). 1992. Effect of soil water on the net photosynthetic rate in peanut. J Shandong Agric Univ (山东农业大学学报), 23 (1):31～35 (in Chinese)
[14] Wang H(王宏),Yang C-H(杨春虹).1987.The relationship between stomatal conductance of wheat and potential of soil matrixes.Acta Ecol Sin (生态学报), 7(3):203～213(in Chinese)
[15] Wang Y-H(王玉辉), H X-Y(何兴元), Zhou G-S(周广胜). 2001.Characteristics and quantitative simulation of stomatal conductance of Aneurolepidium ch inense. Chin J Appl Ecol (应用生态学报),12(4):517～521(in Chinese)
[16] Weng X-Y(翁晓燕),Jiang D-A(蒋德安), Lu Q(陆应), et al.1998. Major factors on diumal changes of rice photosynthetic rate.Chin J Rice Sci (中国水稻科学), 12 (2):105～108 (in Chinese)
[17] Wu Z-H(武志海), Yang M-Y(杨美英), Wu C-S(吴春胜), et al.2001. Varying characteristics of transpiration rate and stomatal conductance in maize canopies. J Jilin Agric Univ (吉林农业大学学报), 23(4):18～20(in Chinese)
[18] Xue H-Q(薛慧勤), Sun L-Z(孙兰珍), Gan X-M(甘信民). 1999.Study on comprehensive assessment and mechanism of drought resistance in peanut cultivars. Agric Res Arid Areas (干旱区农业研究), 17(1):83～87(in Chinese)
[19] Yan J-C(杨建昌), Jonathan W, Zhu Q-S(朱庆森), et al. 1995.Effect of water deficit stress on the stomatal frequency, stomatal conductance and abscisic acid in rice leaves. Acta Agron Sin (作物学报), 21(5):533～539(in Chinese)
[20] Yin Y-F(殷毓芬), Zhang C-L(张存良), Yao F-X(姚凤霞).1995. Relationship of leaf photosynthetic rate with stomatal resistance and stomatal conductance to CO₂ in wheat cultivars. Acta Agron Sin (作物学报), 21(9):561～567(in Chinese)
[21] Zhang X-Y (张喜英), Pei D(裴冬), You M-Z (由懋正). 2000.Response of leaf water potential, photosynthesis and stomatal conductance to varying soil moisture in four crops:Winter wheat, com,sorghum and millet. Acta Phytoecol Sin (植物生态为报), 24(3):280～283 (in Chinese)
[22] Zhang X-Y(张喜英). 1997. Field researches on water potential,transpiration and resistance to water flow for wheat and maize. Acta Geogr Sin (地理学报), 52(6):543～550(in Chinese)
[23] Zhang Y-Q(张永强),Jiang J(姜杰).2001.Effects of leaf water physiological ecology process of winter wheat on soil-water stress condition. Arid Zone Res (干旱区研究), 18 (1):57～61 (in Chinese)