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| VarietalDifferences in PlantGrowth, PhosphorusUptake and Yield Formation in Two Maize Inbred Lines Grown Under Field Conditions |
| CHEN Fan-jun, LIU Xiang-sheng, MI Guo-hua |
| 1.Key Laboratory of Plant-Soil Interactions, Ministry of Education/Center for Resources, Environment and Food Security, China Agricultural University, Beijing 100193, P.R.China |
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摘要 Selection for phosphorus (P)-efficient genotypes and investigation of physiological mechanisms for P-use efficiency in maize has mainly been conducted at the seedling stage under controlled greenhouse conditions. Few studies have analyzed characteristics of plant growth and yield formation in response to low-P stress over the whole growth period under field conditions. In the present study, two maize inbred lines with contrasting yield performances under low-P stress in the field were used to compare plant growth, P uptake and translocation, and yield formation. Phosphorus accumulation in the P-efficient line 154 was similar to that of line 153 under high-P. Under low-P, however, P uptake in line 154 was three times greater than that in line 153. Correspondingly, P-efficient line 154 had a significantly higher yield than P-inefficient line 153 under low-P conditions (Olsen-P=1.60 mg kg-1), but not under high-P conditions (Olsen-P=14.98 mg kg-1). The yield difference was mainly due to differences in the number of ears per m2, that is, P-efficient line 154 formed many more ears under low-P conditions than P-inefficient line 153. Ear abortion rate was 53% in the P-inefficient line 153, while in line 154, it was only 30%. Low-P stress reduced leaf appearance, and delayed anthesis and the silking stage, but increased the anthesis-silking interval (ASI) to a similar extent in both lines. The maximum leaf area per plant at silking stage was higher in P-efficient line 154 than in P-inefficient line 153 under both P conditions. It is concluded that low-P stress causes intense intraspecific competition for limited P resources in the field condition which gives rise to plant-toplant non-uniformity, resulting in a higher proportion of barren plants. As soon as an ear was formed in the plant, P in the plant is efficiently reutilized for kernel development.
Abstract Selection for phosphorus (P)-efficient genotypes and investigation of physiological mechanisms for P-use efficiency in maize has mainly been conducted at the seedling stage under controlled greenhouse conditions. Few studies have analyzed characteristics of plant growth and yield formation in response to low-P stress over the whole growth period under field conditions. In the present study, two maize inbred lines with contrasting yield performances under low-P stress in the field were used to compare plant growth, P uptake and translocation, and yield formation. Phosphorus accumulation in the P-efficient line 154 was similar to that of line 153 under high-P. Under low-P, however, P uptake in line 154 was three times greater than that in line 153. Correspondingly, P-efficient line 154 had a significantly higher yield than P-inefficient line 153 under low-P conditions (Olsen-P=1.60 mg kg-1), but not under high-P conditions (Olsen-P=14.98 mg kg-1). The yield difference was mainly due to differences in the number of ears per m2, that is, P-efficient line 154 formed many more ears under low-P conditions than P-inefficient line 153. Ear abortion rate was 53% in the P-inefficient line 153, while in line 154, it was only 30%. Low-P stress reduced leaf appearance, and delayed anthesis and the silking stage, but increased the anthesis-silking interval (ASI) to a similar extent in both lines. The maximum leaf area per plant at silking stage was higher in P-efficient line 154 than in P-inefficient line 153 under both P conditions. It is concluded that low-P stress causes intense intraspecific competition for limited P resources in the field condition which gives rise to plant-toplant non-uniformity, resulting in a higher proportion of barren plants. As soon as an ear was formed in the plant, P in the plant is efficiently reutilized for kernel development.
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Received: 22 December 2011
Accepted:
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| Fund: This study was funded by the National Natural Science Foundation of China (30890131, 31172015 and 31121062), the National 973 Program of China (2009CB11860), and the Special Fund for the Agriculture Profession, China (201103003). |
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Corresponding Authors:
Correspondence MI Guo-hua, Tel: +86-10-62734454, E-mail: miguohua@cau.edu.cn
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Cite this article:
CHEN Fan-jun, LIU Xiang-sheng, MI Guo-hua.
2012.
VarietalDifferences in PlantGrowth, PhosphorusUptake and Yield Formation in Two Maize Inbred Lines Grown Under Field Conditions. Journal of Integrative Agriculture, 12(10): 1738-1743.
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| [1]Bänziger M, Edmeades G O, Beck D, Bellon M. 2000.Breeding for Drought and Nitrogen Stress Tolerancein Maize: From Theory to Practice. CIMMYT, Mexico.pp. 1-68[2]Bao S D. 2000. Soil and Agricultural Chemistry Analysis,3rd ed. China Agriculture Press, Beijing, China. p. 495.(in Chinese)Borrás L,Maddonni GA, Otegui ME. 2003. Leaf senescencein maize hybrids: plant population, row spacing andkernel set effect. Field Crops Research, 82, 13-26[3]Carlos C V, Fulgencio A C, June S W, Luis H E. 2009. Maizeunder phosphate limitation. In: Bennetzen J L, Hake SC, eds., Handbook of Maize: Its Biology. SpringerScience & Business Media, LLC. Springer Online, NewYork. pp. 381-404[4]Clark R B, Brown J C. 1974. Differential phosphorus uptakeby phosphorus-stressed corn inbreds. Crop Science,14, 505-508[5]ColombB, Kiniry JR,Debaeke P. 2000. Effect of soil phosphoruson leaf development and senescence dynamics of fieldgrownmaize. Agronomy Journal, 92, 428-435[6]Corrales I, Amenós M, Poschenrieder C, Barceló J. 2007.Phosphorus efficiency and root exudates in twocontrasting tropical maize varieties. Journal of PlantNutrition, 30, 887-900[7]Fan M S, Bai R Q, Zhao X F, Zhang J H. 2007. Aerenchymaformed under phosphorus deficiency contributes to thereduced root hydraulic conductivity in maize roots.Journal of Integrative Plant Biology, 49, 598-604[8]FanM S, Zhu J M, Richards C, Brown KM, Lynch J P. 2003.Physiological roles for aerenchyma in phosphorusstressedroots. Functional Plant Biology, 30, 493-506[9]Fitter A H, Hay R K M. 1987. Environmental Physiology ofPlants. 2nd ed. Academic Press, San Diego, USA.Gaume A, Mächler F, Leòn C D, Narro L, Frossard E. 2001.Low-P tolerance by maize genotypes: significance ofroot growth, and organic acids and acid phosphataseroot exudation. Plant and Soil, 228, 253-264[10]Hajabbasi M A, Schumacher T E. 1994. Phosphorus effectson root growth and development in two maizegenotypes. Plant and Soil, 158, 39-46[11]Horst WJ, Abdou M, Wiesler F. 1993. Genotypic differencein phosphorus efficiency in wheat. Plant and Soil, 155-156, 293-296[12]Li K P, Xu Z P, Zhang K W, Yang A F, Zhang J R. 2007.Efficient production and characterization for maizeinbred lines with low-phosphorus tolerance. PlantScience, 172, 255-264[13]Liu Y, Mi G H, Chen F J, Zhang J H, Zhang F S. 2004.Rhizosphere effect and root growth of two maize (Zeamays L.) genotypes with contrasting P efficiency atlow P availability. Plant Science, 167, 217-223[14]Lynch J P, Brown K M. Root strategies for phosphorusacquisition. 2008. In: White P J, Hammond J P, eds., TheEcophysiology of Plant-Phosphorus Interactions. SpringerScience & Business Media B V, Berlin. pp. 83-116[15]Marschner H. 1995. Mineral Nutrition of Higher Plants.2nd ed. Academic Press, London.Petersen W, Böttger M. 1991. Contribution of organic acidsto the acidification of the rhizosphere of maizeseedlings. Plant and Soil, 132, 159-163[16]Plénet D, Etchebest S, Mollier A, Pellerin S. 2000a. Growthanalysis of maize field crops under phosphorusdeficiency. I. leaf growth. Plant and Soil, 223, 117-130[17]Plénet D, Mollier A, Pellerin S. 2000b. Growth analysis ofmaize field crops under phosphorus deficiency. II.Radiation-use efficiency, biomass accumulation andyield components. Plant and Soil, 224, 259-272[18]SAS Institute. 1988. SAS/STAT User’s Guide. ver. 6.03. Cary,NC, USA.Schenk M K, Barber S A. 1979. Root characteristics of corngenotypes as related to P uptake. Agronomy Journal,71, 921-924[19]da Silva E A, Gabelman WH. 1992. Screening maize inbredlines for tolerance to low-P stress condition. Plant andSoil, 146, 181-187[20]da Silva E A, Gabelman W H, Coors J G. 1992. Inheritancestudies of low-phosphorus tolerance in maize (Zea mayL.) grown in a sand-alumina culture medium. Plant andSoil, 146, 189-197[21]Tollenaar M, Wu J. 1999. Yield improvement in temperatemaize is attributable to greater stress tolerance. CropScience, 39, 1597-1604[22]Wang Z X. 1999. Maize in Shangdong Province.Agricultural Press of China, Beijing. China. pp. 121-169. (in Chinese) |
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