Putative Mechanisms of Drought Tolerance in Maize (Zea mays L.) via Root System Architecture Traits
Annual Research & Review in Biology,
Page 1-19
DOI:
10.9734/arrb/2019/v32i230079
Abstract
Identifying maize genotypes with favorable root architecture traits for drought tolerance is prerequisite for initiating a successful breeding program for developing high yielding and drought tolerant varieties of maize. The aims of the present study were: (i) to identify drought tolerant genotypes of maize at flowering and grain filling, (ii) to interpret the correlations between the drought tolerance and root architecture traits and (iii) to identify the putative mechanisms of drought tolerance via root system traits. An experiment was carried out in two years using a split plot design with three replications. The main plots were assigned to three water stress levels, namely: well watering (WW), water stress at flowering (WSF) and water stress at grain filling (WSG), and sub-plots to 22 maize cultivars and populations. Drought tolerance index (DTI) had strong and positive associations with crown root length (CRL), root circumference (RC) and root dry weight (DRW) under both WSF and WSG, a negative correlation with brace root whorls (BW), and positive correlations with crown root number (CN) under WSF and brace root branching (BB) and crown root branching (CB) under WSG. These root traits are therefore considered as putative mechanisms of drought tolerance. The cultivars Pioneer-3444, SC-128, Egaseed-77, SC-10 and TWC-324 showed the most drought tolerant and the highest yielding in a descending order; each had a number of such drought tolerance mechanisms. Further investigation should be conducted to determine the underlying root mechanisms contributing to the selection of water-efficient hybrids of maize.
Keywords:
- Corn
- crown and brace roots
- correlations
- drought tolerance index
How to Cite
References
Witt S, Galicia L, Lisec J, Cairns J, Tiessen A, Araus JL, Palacios-Rojasand N, Fernie ARR. Metabolic and phenotypic responses of greenhouse-grown maize hybrids to experimentally controlled drought stress. Mol. Plant. 2012;5:401–417.
Edmeades GO, Bolanos J, Hernandez M, Ballo S. Causes for silk delay in a low land tropical maize population. Crop Sci. 1993; 33:1029-1035.
Lynch JP. Root architecture and plant productivity. Plant Physiol. 1995;109:7-13.
Lynch JP. Roots of the second green revolution. Aust. J. Bot. 2007;55:493-512.
Hund A, Reimer R, Messmer R. A consensus map of QTLs controlling the root length of maize. Plant and Soil. 2011; 344:143-158.
Rauf S, Sadaqat HA. Effect of osmotic adjustment on root length and dry matter partitioning in sunflower (Helianthus annuus L.) under drought stress. Acta Agric Scand, Section B, Soil & Plant Sci. 2008;58(3):252-260.
Rauf S, Sadaqat HA, Ahmed R, Khan IA. Genetics of root characteristics in sunflower (Helianthus annuus L.) under contrasting water regimes. Ind. J. Plant Physiol. 2009;14:319-327.
King CA, Purcell LC, Brye KR. Differential wilting among soybean genotypes in response to water deficit. Crop Sci. 2009; 49:290–298.
Trachsel S, Kaeppler SM, Brown KM, Lynch JP. Shovelomics: High throughput phenotyping of maize (Zea mays L.) root architecture in the field. Plant Soil. 2011; 341:75-87.
Fageria NK. Maximizing crop yields. Dekker. New York. 1992;423.
Steel RGD, Torrie GH, Dickey DA. Principles and procedures of statistics: A biometrical approach. 3rd ed. McGraw-Hill, New York, USA; 1997.
Singh P, Narayanan SS. Biometrical techniques in plant breeding. Kalayani Publishers, New Delhi, India; 2000.
Al-Naggar AMM, Abdalla AMA, Gohar AMA, Hafez EHM. Tolerance of 254 maize doubled haploid lines × tester crosses to drought at flowering and grain filling. J. Appl. Life Sci. Inter. 2016;9(4):1-18.
Al-Naggar AMM, Shafik MM, Elsheikh MO. Correlations and heritability for root architecture traits of maize under water stress at flowering and grain filling. Bioscience Research. 2018;15(4):4571-4583.
Al-Naggar AMM, Shabana R, Mahmoud AA, Abdel El-Azeem MEM, Shaboon SAM. Recurrent selection for drought tolerance improves maize productivity under low-N conditions. Egypt. J. Plant Breed. 2009; 13:53-70.
Al-Naggar AMM, Soliman SM, Hashimi MN. Tolerance to drought at flowering stage of 28 maize hybrids and populations. Egypt. J. Plant Breed. 2011;15(1):69-87.
Al-Naggar AMM, Atta MMM, Ahmed MA, Younis ASM. Influence of deficit irrigation at silking stage and genotype on maize (Zea mays L.) agronomic and yield characters. J. Agric. and Ecol. Res. Inter. 2016b;7(4):1-16.
Al-Naggar AMM, Shabana R, Hassanein MS, Metwally AMA. Effects of genotype, plant density and their interaction on maize yield and traits related to plant density tolerance. Bioscience Research. 2017; 14(2):395-407.
Al-Naggar AMM, Shabana R, Hassanein MS, Elewa TA, Younis ASM, Metwally AMA. Secondary traits and selection environment of plant density tolerance in maize in breds and testcrosses. Journal of Advances in Biology & Biotechnology. 2017;14(3):1-13.
Wright GC, Nageswara Rao RC. Groundnut water relations. In: Smartt J (Ed.) The groundnut crop: A scientific base for improvement. Chapman and Hall, London, UK. 1994;281-325.
Henry A, Gowda VRP, Torres RO. Variation in root system architecture and drought response in rice (Oryza sativa): phenotyping of the Oryza SNP panel in rainfed lowland fields. Field Crops Res. 2011;120:205-214.
Hund A, Trachsel S, Stamp P. Growth of axile and lateral roots of maize: I Development of a phenotyping platform. Plant and Soil. 2009;325(1):335-349.
Hund A. Genetic variation in the gravitropic response of maize roots to low tempera-tures. Plant Root. 2010;4:22-30.
Sattelmacher B, Horst WJ, Becker HC. Factors that contribute to genetic variation for nutrient efficiency of crop plants. Zeitschrift fur Planzenernährung und Bodenkunde. 1994;157:215-224.
Worku M, Banziger M, Erley GSA, Alpha DF, Diallo O, Horst WJ. Nitrogen uptake and utilization in contrasting nitrogen efficient tropical maize hybrids. Crop Sci. 2007;47:519-528.
Al-Naggar AMM, Shabana RA, Atta MMM, Al-Khalil TH. Maize response to elevated plant density combined with lowered N-fertilizer rate is genotype-dependent. The Crop Journal. 2015;3(2):96-109.
Al-Naggar AMM, Shafik MM, Elsheikh MO. Influences of genotype and drought at flowering and grain filling on root architecture traits of Zea mays L. Asian Journal of Agricultural and Horticultural Research. 2018;2(4):1-14.
Fageria NK, Baligar VC. Screening crop genotypes for mineral stresses. In: Adaptation of Plants to Soil Stress, (Eds. Maranville J, Baligar W, , Duncan VC, RR, Yohe JM), Nebraska-Lincoln Press, Inc, United states, NE. 1994;152-159.
Fageria NK, Baligar VC. Phosphorous-use efficiency by corn genotypes. J. Plant Nutr. 1997;20:1267-1277.
Fageria NK, Baligar VC. Integrated plant nutrient management for sustainable crop production-An over. Inter. J. Trop. Agri. 1997;15:7-18.
Shao H, Dongfeng S, Wenjun S, Xiangben B, Yachao C, Wei R, Fanjun C, Guohua M. Genotypic difference in the plasticity of root system architecture of field-grown maize in response to plant density. Plant Soil. 2019; 1-17.
DOI: doi.org/10.1007/s11104-019-03964-8
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