Relationship between wheat root activity and leaf senescence

Abstract

Abstract: A field trial on the wheat root activity, chlorophyll content and photosynthetic rate showed that the decline of root activity was earlier and faster than that of flag leaf chlorophyll content and photosynthetic rate, and there was a positive correlation between root activity and leaf photosynthetic rate(r=0.8006).Topdressing nitrogen fertilizer at elongation stage could obviously improve root activity and photosynthetic rate, decrease leaf ABA con-tent, increase ZRs content and SOD activity, and delay the peak value of MDA for 8～10 days, which suggested that the variation of root activity was closely related to the senescence of flag leaf. Improving root nutrition and root activity at earlier growth stages could delay the senescence of wheatleaf.

Key words: Wheat, Root activity, Flag leaf, Senescence

CLC Number:

Q945.18

WEI Daozhi, NING Shuju, LIN Wenxiong. Relationship between wheat root activity and leaf senescence[J]. Chinese Journal of Applied Ecology, 2004, (9): 1565-1569.

References

[1] Ambler JR, Morgan PW, Jordan WR. 2003. Amounts of Zeatin and Zeatin riboside in Xylem sap of senescent and no senescent. Crop Scie, 32:411～419
[2] Bai B-Z(白宝璋),Wang J-A(王景安),Sun Y-X(孙玉霞),et al.1988. Measurement Technique of Plant Physiology. Beijing: China Science and Technology Press. (in Chinese)
[3] Department of Biology, East China Normal University. 1980. Guide of Plant Physiology Experiment. Shanghai:Shanghai Higher Education Press. (in Chinese)
[4] Feng Y-L(冯玉龙),Zhang Y-J(张亚杰),Zhu C-Q(朱春全).2003. Reationship between photo-inhibition of photosynthesis and reactive oxygen species in leaves of poplars suffering root osmotic stress.Chin J Appl Ecol(应用生态学报),14(8):1213～1217(in Chinese)
[5] Garrison FR, Brinker AM, Nooden LD. 1984. Relative activity of xylem-supplied cytokinin in retarding soybean leaf senescence and sustaining pod development. Plant Cell Physiol, 25(2) :213 ～224
[6] Gepstein S, Thiamin KV. 1980. Changes in the abscisic acid content of oat leaves during senescence. Proc Natl Acad Sci, 77: 2050 ～2053
[7] Huang H(黄海).1987.Effect of the N6(benzyl)adenine on the degradation rate of the ABA in wheat leave.J Plant Physiol(植物生理学报),13(3):321～329(in Chinese)
[8] Jiang D(姜东),Tao Q-N(陶勤南),Zhang G-P(张国平).2002.Effect of waterlogging on senescence of flag leaf and root of wheat Yangmeais.Chin J Appl Ecol(应用生态学报),13(11):1519～1521 ( in Chinese)
[9] Jin J(金剑),Liu X-B(刘晓冰),Wang G-H(王光华).2002.Advances in root research of soybean Glycine max (L.) Merrill. Soybean Sci(大豆科学),21(3):223 227(in Chinese)
[10] Li Z-T(李宗霆),Zhou X(周燮).1997.Pant Hormones and Their Immunoassays. Nanjing: Jiangsu Science and Technology Press. (in Chinese)
[11] Liu D-H(刘道宏).1983.Senescence of plant leaf.Plant Physiol Commu(植物生理学通讯),(2):14～19(in Chinese)
[12] Liu D-Y(刘殿英),Dong Q-Y(董庆裕).1993.Effects of topdressing on root, root activity and plants characteristics of winter wheat at different stage.Acta Agron Sin(作物学报),19(2):149～155(in Chinese)
[13] Liu X-B(刘晓冰),Wang G-H(王光华).2001.Study status of root and prospect.Wold Agic(世界农业),(8):33～35(in Chinese)
[14] Lu D-Z(陆定志).1983.Leaf senescence and regulation to it.Progr Plant Physiol Biochem(植物生理生化进展),(3):20～25(in Chinese)
[15] Matthew SM, Lee CG, Frank S. 2001. Effects of PSAG12-IPT gene expression on development and senescence in Transgenic Lettucel. Plant Physiol, 127 (9): 505 ～ 516
[16] Okamoto, Jun ABE, Junko Yanagishi. 2000. Bleeding rate of fieldgrowth maize with reference to root system development. Jap J Crop Sci, 69(1) :80～85
[17] Ouatrao RS, Davies PJ. 1997. Plant hormone and theirrole in plant growth and development. J Exp Bot, 23: 914 ～ 920
[18] Pan X-H(潘晓华),Wang Y-R(王永锐),Fu J-R(傅家瑞).1996.Advances in the study on the growth-Physiology in rice of root system(Oryza sativa).Chin Bull Bot(植物学通报),13(2):13～20(in Chinese)
[19] Shen B(沈波),Wang X(王熹).2002.Physiology activities of root system in two inter-subspecific hybrid rice combination. Chin J Rice(中国水稻科学),16(2):146～150(in Chinese)
[20] Shen Q-W(沈其伟).1988.Measurement of contents of chlorophyll in rice leaf-extracting method by mixture solution. Plant Physiol Commu(植物生理学通讯),(3):62～64(in Chinese)
[21] Wang R-F(王荣富),Zhang Y-H(张云华),Qian L-S(钱立生),et al. 2003. Photooxidation characteristics of super-hybrid rice "Liangyoupeijiu"and its parents.Chin J Appl Ecol(应用生态学报),14(8):1309～1312(jn Chinese)
[22] Wang Y-R(王彦荣),Hua Z-T(华泽田),Chen W-F(陈温福).2003. Relation between root and leaf senescence and their effects on grain-Filling in Japonica rice.Acta Agron Sin(作物学报),20(6):892～898(in Chinese)
[23] Wei D-Z(魏道智),Dai X-B(戴新宾),Xu X-M(许晓明).1998.Several hypotheses on the machanism of the plant leaf senescence.Guihaia(广西植物),18(1):89～96(in Chinese)
[24] Wei D-Z(魏道智),Ning S-J(宁书菊).2002.Changes of hormones concentration and senescence of the wheat.Guihaia(广西植物),22 (4): 382 ～ 384 ( in Chinese)
[25] Wu Y-X(吴岳轩),Wu Z-Q(吴振球).1992.A study on the correlation between root metabolic activity and leaf senescing process of hybrid rice.Hybird Rice(杂交水稻),(3):23～29(in Chinese)
[26] Liu XZ, Huang BR. 2002. Cytokinin effects on creeping bentgrass response to heat stress Ⅱ. Leaf senescence and antioxidant metabolism. Crop Sci, 42: 466～ 472
[27] Yang Jianchang, Zhang Jianhua, Wang Zhiqing. 2002. Abscisic acid and cytokinins in the root exudates and leaves and their relationship to senescence and remobilization of carbon reserves in rice subjected to water stress during grain filling. Planta, 215(4):645～652
[28] Yang Z-S(杨兆生),Zhang L-Z(张立桢),Yan S-H(闫素红),et al. 1998. Studies on declining and distribution law of wheat root after blooming.J Tritic Crops(麦类作物),8(5):40～42(in Chinese)
[29] Zhang X(张雄).1982.Measurement of activity of root and pollen with TTC method and its application. Plant Physiol Commu (植物生理学通讯),(3):48～50(in Chinese)
[30] Zhang X-M(张雪梅),Gao Z-Y(高振玉),Sang T(桑涛),et al.2000. Effect of fertilizer on wheat yield during elongation-boot stage.J Anhui Agric Sci(安徽农业科学),28(1):80～83(in Chinese)