根源信号参与调控气孔行为的机制及其农业节水意义

摘要/Abstract

摘要： 在土壤干旱情况下,根源信号一方面向植物地上部分的长距离传输,为地上部分提供了土壤水分获取能力的测度,另一方面调控气孔开度,抑制蒸腾作用并提高植物的水分利用效率.文中综述了根源信号参与调控植物水分利用的生理机制和理论模型,指出该模型与根系吸水模型、气孔导度模型耦合,能够更好地反映植物叶片对土壤干旱以及大气干旱的响应.评述了在根源信号参与调控植物水分关系的基础上发展的调亏灌溉(RDI)、部分根系干旱(PRD)和控制性交替灌溉(CAI)等有效灌溉手段,有助于合理配置根系层供水量,通过根土相互作用和信号物质的传输,降低蒸腾和提高水分利用效率.另外,根源信号在调控根系生长发育、延缓地上部分生长以调节根冠比例,优化资源分配以利于生殖生长等方面均有所为,为全面提高农田水分利用效率提供节水生理基础.

关键词: 根源信号, 气孔, 模型, 水分利用效率, 农业节水

Abstract: Under soil drought condition,root sourced signal abscisic acid (ABA) plays an important role in the long distance signaling process,and can be a measurement of soil water availability.ABA is also an effective stomatal closing agent,and acts to reduce transpiration and canopy water loss.This paper briefly introduced the physiological mechanism and theoretical model about the stomatal regulation by root sourced signaling,and indicated that the combination of this model with root water absorption model and stomatal conductance model could be more effective in depicting the response of plant to soil drying and atmospheric drought.In addition,some effective irrigation approaches,such as regulated deficit irrigation (RDI),partial root-zone drying (PRD) and controlled alternative irrigation (CAI) were profited from the mechanism of plant water use regulation by the root sourced signaling.These irrigation measures favored to reasonably distribute available soil water in root zone.Root signaling system also played important role in regulating root growth and its development,retarding shoot growth to adjusting root shoot ratio,and optimizing assimilation allocation to favor to improve reproductive development.These processes hold substantial promise for enhancing crop water use efficiency.

Key words: Root sourced signaling, Stomata, Model, Water use efficiency, Water saving

中图分类号:

S181

郭安红, 李召祥, 刘庚山, 阳园燕, 安顺清. 根源信号参与调控气孔行为的机制及其农业节水意义[J]. 应用生态学报, 2004, (6): 1095-1099.

GUO Anhong, LI Zhaoxiang, LIU Gengshan, YANG Yuanyan, AN Shunqing . Mechanism of stomatal regulation by root sourced signaling and its agricultural significance[J]. Chinese Journal of Applied Ecology, 2004, (6): 1095-1099.

参考文献

[1] Ackerson RC.1985.Invertase activity and abscisic acid in relation to carbohydrate status in developing soybean reproductive structures.Crop Sci,25:615～618
[2] Assmann SM,Snyder JA,Lee YRJ.2000.ABA-deficient (aba1) and ABA-insensitive (abi-1,abi-2) mutants of Arabidopsis have a wild-type stomatal response to humidity.Plant Cell Environ,23:387～395
[3] Ball JT,Woodrow IE,Berry JA.1987.A model predicting stomatal conductance and its contribution to the control of photosynthesis under different environmental conditions.In:Biggins J ed.Progress in Photosynthesis Research.Vol.4.Dordrecht:Martinus Nijhoff Publishers.221～234
[4] Begg JE,Turner NC.1976.Crop water deficits.Adv Agron,28:161～217
[5] Blackman PG,Davies WJ.1985 Root-to-shoot communication in maize plants of the effect of soil drying.J Exp Bot,36:39～48
[6] Blum A,Johnson JW.1993.Wheat cultivar responds differently to drying topsoil and a possible non-hydraulic root signal.J Exp Bot,44(264):1149～1153
[7] Davies WJ,Mansfield TA,Orton PJ.1978.Strategies employed by plants to conserve water:Can we improve on them?Proc Brit Crop Prot Counc,8:45～54
[8] Davies WJ,Zhang J.1991.Root signals and the regulation of growth and development of plants in drying soil.Ann Rev Plant Physiol Mol Biol,42:55～76
[9] Dewdney SJ,McWha JA.1979.Abscisic acid and the movement of photosynthetic assimilations toward developing wheat (Tritivum sativum L.) grains.Zeitschrift Pflanzenphysio,92:186～193
[10] Dry PR,Loverys BR,Botting D,et al.1996.Effects of partial rootzone drying on grapevine vigour,yield,composition of fruit and use of water.Proc Austr Wine Indust Tech Conf,9:126～131
[11] Gallardo M,Turner NC,Ludwig C.1994.Water relation,gas exchange and abscisic acid content of Lupinus cosentinii leaves in response to drying different proportions of the root system.J Exp Bot,45(276):909～918
[12] Gowing DJ,Davies WJ,John HG.1990.A positive root-sourced signal as an indicator of soil drying in apple,Malse domestica Borkh.J Exp Bot,41:1535～1540
[13] Gowing DJ,Jones HG,Davies WJ.1993.Xylem-transported abscisic acid:the relative importance of its mass and its concentration in the control of stomatal aperture.Plant Cell Environ,16:453～459
[14] Hartung W,Davies WJ.1991.Drought-induced changes in physiology and ABA.In:Davies WJ,Jones HG,eds.Abscisic acid:Physiology and Biochemistry.Oxford:BIOS Scientific Publishers.63～79
[15] Hartung W,Sauter A,Hose E.2002.Abscisic acid in the xylem:Where dose it come from,where dose it go to?J Exp Bot,53:27～32
[16] Imad NS,Robert ES,Jeremy P,et al.1990.Increased endogenous abscisic acid maintains primary root growth and inhibits shoot growth of maize seedling at low water potentials.Plant Physiol,93:1329～1336
[17] Jensen CR,Henson IE,Turner NC.1991.Leaf gas exchange and water relation of lupins and wheat II.Root and shoot water relations of lupins during drought-induced stomatal closure.Austr J Plant Physiol,16:415～428
[18] Jin M-X(金明现),Wang T-D(王天铎).1997.A mathematical simulation of stomatal regulation associated with root-originated ABA.Acta Bot Sin(植物学报),39(4):335～340(in Chinese)
[19] Kang S-Z(康绍忠),Zhang J-H(张建华),Liang Z-S(梁宗锁),et al.1997.Controlled roots-divided alternative irrigation-A new field water saving and regulation approach.Agric Res Arid Areas(干旱地区农业研究),15(1):1～6(in Chinese)
[20] Kang S-Z(康绍忠),Xiong Y-Z(熊运章),Liu X-M(刘晓明).1991.A study of Penman-Monteith model to estimate crop transpiration.Acta Univ Agric Boreali-Occident(西北农业大学学报),19(1):13～20(in Chinese)
[21] Khalil AAM,Grace J.1993.Dose xylem sap ABA control the stomatal behavior of water stressed sycamore (Acer pseudoplatanus L.) seedlings?J Exp Bot,44:1127～1134
[22] Leuning R.1995.A critical appraisal of a combined stomatal photosynthesis model for C3 plants.Plant Cell Environ,18:339～355
[23] Liang J-S(梁建生),Zhang J-H(张建华).1998.Production,transport and physiological functions of stress signal abscisic acid in roots.Plant Physiol Commun(植物生理学通讯),34(5):329～338(in Chinese)
[24] Monteith JL.1965.Evaporation environ.Symp Soc Exp Biol,19:205～234
[25] Robert ES,Wu YJ,Gary SV,et al.1994.Confirmation that abscisic acid accumulation is required for maize primary root elongation at low water potentials.J Exp Bot,45:1743～1751
[26] Shan L(山仑),Chen G-L(陈国良).1993.Theories and Practices of Dryland Agriculture in Loess Plateau.Beijing:Science Press.215～217(in Chinese)
[27] Tardieu F,Zhang J,Katerji N,et al.1992.Xylem ABA controls the stomatal conductance of field-grown maize subject to soil compacting and soil drying.Plant Cell Environ,15:193～197
[28] Tardieu F,Davies WJ.1992.Stomatal response to ABA is a function of current plant water status.Plant Physiol,98:540～545
[29] Tardieu F,Zhang J,Gowing DJ.1993.Stomatal control by both [ABA] in the xylem sap and leaf water status:A test of a model for droughted or ABA-fed filed grown maize.Plant Cell Environ,16:413～420
[30] Tardieu F,Davies WJ.1993 Integration of hydraulic and chemical signalling in the control of stomatal conductance and water status of droughted plants.Plant Cell Environ,16:341～349
[31] Tietz A,Ludwig M,Dingkuhn M,et al.1981.Effect of abscisic acid on the transport of assimilates in barley.Planta,152:557～561
[32] Trejo CL,Davies WJ,Ruiz PL.1993.Sensitivity of stomata to abscisic acid.Plant Physiol,102:497～502
[33] Trejo CL,Clephan AL,Davies WJ.1995.How do stomata read abscisic acid signals?Plant Physiol,109:803～811
[34] Turner NC.1997.Further progress in crop water relations.Adv Agron,58:293～338
[35] Van den Honert TH.1948.water transport in plants as a catenary processes.Disc Faraday Soc,3:146～153
[36] Wilkinson S,Davies WJ.1997.Xylem sap pH increase:A drought signal received at the apoplastic face of the guard cell that involves the suppression of saturable abscisic acid uptake by the epidermal symplast.Plant Physiol,113:559～573
[37] Zhang J,Schurr U,Davies WJ.1987.Control of stomatal behavior by abscisic acid that originated in roots.J Exp Bot,38:1174～1181
[38] Zhang J,Davies WJ.1989.Abscisic acid produced in dehydrating roots may enable the plant to measure the water status of the soil.Plant Cell Environ,12:73～81
[39] Zhang J,Davies WJ.1989.Sequential response of whole plant relations to prolonged soil drying and the involvement of xylem sap ABA in the regulation of stomatal behavior of sunflower plants.New Phytol,113:116
[40] Zhang SQ,Outlaw WH Jr.2001.Abscisic acid introduced into the transpiration stream accumulates in the guard-cell apoplst and cause stomatal closure.Plant Cell Environ,24:1045～1054