Root system hydraulic conductivity of different genotype maize and its relationship with root anatomy

Abstract

Abstract: Under solution culture condition and by using pressure chamber techniques,this paper studied the difference of root system hydraulic conductivity (Lpr) of different genotype maize at the level of individual root,and its relationship with root anatomy.The results showed that the Lpr of root system was different with different genotype,and there existed heterosis in F₁ generation.Under normal culture condition,the root with wider vessels had higher Lpr and drought resistance; while under water deficit,there was a significantly negative correlation between the width of root vessel and the Lpr and drought resistance.Under both normal and deficient water supply,there was a negative correlation between the ratio of cortex to root diameter and the Lpr and drought resistance,suggesting that root cortex was the placement with the greatest resistance to the liquid water flow in plant.

Key words: Water deficit, Maize, Hydraulic conductivity, Anatomic structure

CLC Number:

Q945.79

WANG Zhoufeng, ZHANG Suiqi, LIU Xiaofang. Root system hydraulic conductivity of different genotype maize and its relationship with root anatomy[J]. Chinese Journal of Applied Ecology, 2005, 16(12): 2349-2352.

References

[1]Brar GS,McMichael Bl,Taylor HM.1990.Hydraulic conductivity of cotton roots as influenced by plant age and rooting medium.Agron J,82:264～266
[2]Dudley JW,Saghai MA,Rufener GK,1991.Molecular markers and grouping of parents in maize breeding progant.Crop Sci,31:718～723
[3]Frensch J,Hsiao TC,Steudle E.1996.Water and solute transport along developing maize roots.Planta,198:348～355
[4]Guo A-H(郭安红),Li Z-X(李召祥),Liu G-S(刘庚山).2004.Mechanism of stomatal regulation by root sourced signaling and its agricultural significance.Chin J Appl Ecol(应用生态学报),15(6):1095～1099(in Chinese)
[5]Kramer PJ,Boyer JS.1995.Water Relations of Plants and Soil.Orlando:Academic Press.
[6]Liang K-J(梁康迳).1999.Interactive effect of genotype and environmental on heterosis of panicle of rice.Chin J Appl Ecol(应用生态学报),10(6):683～688(in Chinese)
[7]Li L-H(李鲁华),Li S-Q(李世清).2001.Review of the relationship between wheat roots and water stress.Acta Bot Boreal-Occident Sin(西北植物学报),21(1):1～7(in Chinese)
[8]Melchior W,Steudle E.1993.Water transport in onion(Allium cepa L.) root.Plant Physiol,101:1305～1315
[9]Mu Z-X(慕子新),Zhang S-Q(张岁岐).2003.Effect of nitrogen and phosphorus-deficiency on maize root hydraulic conductivity.Plant Physiol Molecular Biol(植物生理与分子生物学报),29(1):45～51(in Chinese)
[10]Naoko Miyaamoto,Steudle E,Hirasawa T,et al.2001.Hydraulic conductivity of rice roots.J Exp Bot,52(362):1835～1846
[11]Newman EI.1973.Permeability to water of the roots of five herbaceous species.New Phytol,72:547～555
[12]Person CA,Steudle E.1993.Lateral hydraulic conductivity of early metaxylem vessels in Zea mays L. toots.Planta,189:288～297
[13]Rieger M,Paula L.1999.Root system hydraulic conductivity in species with contrasting root anatomy.J Exp Bot,50:201～209
[14]Sanderson J.1983.Water uptake by different regions of the barley root.Pathways of radial flow in relation to the development of the endodermis.J Exp Bot,34:240～253
[15]Steudel E.2000a.Water uptakes by roots:Effects of water deficit.J Exp Bot,51(special issue):1531～1542
[16]Steudle E,Peterson CA.1998.How does water get through roots?J Exp Bot,322:775～788
[17]Stuber CW,Lincoln SE,Wolff DW,et al.1992.Identification of genetic factors contributing to Heterosis in a hybird from two elite maize inbred lines using molecular markers.Genetics,132:823～839
[18]Zimmermann HM,Steudle E.1998.Apoplastic transport across young maize roots:Effect of the exodermise.Planta,206:7～19
[19]Tyree MT,Yang S.1992.Hydraulic conductivity recovery versus water pressure in xylem of Acer saccharum.Plant Physiol,100:669～676
[20]Weatherley PE.1982.Water uptake and flow into roots.In:Lange OL,Nobel PS,Osmond CB,eds.Encyclopedia of Plant Physiology.Vol.12B. Berlin:Springer Verlag.79～109
[21]Wu M-S(吴敏生),Dai J-R(戴景瑞).2000.Use of AFLP marker to predict the hybrid yield and yield Heterosis in maize.Acta Bot Sin(植物学报),42(6):600～604(In Chinese)
[22]Xu K(徐坤),Zou Q(邹奇),Zhao Y(赵燕).2003.Effects of soil water stress and shading on growth characteristics of ginger.Chin J Appl Ecol(应用生态学报),14(10):1645～1648(in Chinese)
[23]Zhang S-Q(张岁岐),Shan L(山仑).2001.Research progress on water uptake in plant roots.Chin J Appl Environ Biol(应用与环境生物学报),7(4):396～402(in Chinese)