Differential Responses of some Rice Genotypes to Drought Stress at Different Growth Stages

Drought stress has adverse effects on crop growth and yield, and its identification and monitoring play vital roles in precision crop water management. Accurately evaluating the effect of drought stress on crop photosynthetic capacity can provide a basis for decisions related to crop drought stress identification and monitoring as well as drought stress resistance and avoidance. In this study, the effects of different degrees of persistent drought in different growth stages (3rd leaf stage, 7th leaf stage and jointing stage) on the maximum carboxylation rate at a reference temperature of 25 °C (Vcmax25) of the first fully expanded leaf and its relationship to the leaf water content (LWC) were studied in a field experiment from 2013 to 2015. The results indicated that the LWC decreased continuously as drought stress continued and that the LWC decreased faster in the treatment with more irrigation. Vcmax25 showed a decreasing trend as the drought progressed but had no clear relationship to the growth stage in which the persistent drought occurred. Vcmax25 showed a significantly parabolic relationship (R2 = 0.701, p < 0.001) with the LWC, but the different degrees of persistent drought stress occurring in different growth stages had no distinct effect on the LWC values when Vcmax25 reached its maximum value or zero. The findings of this study also suggested that the LWC was 82.5 ± 0.5% when Vcmax25 reached its maximum value (42.6 ± 3.6 μmol m−2 s−1) and 67.6 ± 1.2% (extreme drought) when Vcmax25 reached zero. These findings will help to improve crop drought management and will be an important reference for crop drought identification, classification and monitoring as well as for the development of drought monitoring and early warning systems for other crops or maize varieties.

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Quantitative Response of Soybean Development and Yield to Drought Stress during Different Growth Stages in the Huaibei Plain, China

Agronomy ◽

10.3390/agronomy8070097 ◽

2018 ◽

Vol 8 (7) ◽

pp. 97 ◽

Cited By ~ 8

Author(s):

Yanqi Wei ◽

Juliang Jin ◽

Shangming Jiang ◽

Shaowei Ning ◽

Li Liu

Keyword(s):

Drought Stress ◽

Growth Stages ◽

Different Growth Stages ◽

Quantitative Response

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QTLs for cell wall-bound phenolics in relation to the photosynthetic apparatus activity and leaf water status under drought stress at different growth stages of triticale

Molecular Genetics and Genomics ◽

10.1007/s00438-016-1276-y ◽

2016 ◽

Vol 292 (2) ◽

pp. 415-433 ◽

Cited By ~ 11

Author(s):

Tomasz Hura ◽

Mirosław Tyrka ◽

Katarzyna Hura ◽

Agnieszka Ostrowska ◽

Kinga Dziurka

Keyword(s):

Cell Wall ◽

Drought Stress ◽

Water Status ◽

Photosynthetic Apparatus ◽

Leaf Water ◽

Growth Stages ◽

Leaf Water Status ◽

Bound Phenolics ◽

Different Growth Stages

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Uptake, Translocation, and Remobilization of Zinc Absorbed at Different Growth Stages by Rice Genotypes of Different Zn Densities

Journal of Agricultural and Food Chemistry ◽

10.1021/jf100017e ◽

2010 ◽

Vol 58 (11) ◽

pp. 6767-6773 ◽

Cited By ~ 66

Author(s):

Chun-yong Wu ◽

Ling-li Lu ◽

Xiao-e Yang ◽

Ying Feng ◽

Yan-yan Wei ◽

...

Keyword(s):

Growth Stages ◽

Rice Genotypes ◽

Different Growth Stages

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Effects of drought stress and rewatering on antioxidant systems and relative water content in different growth stages of maize (Zea maysL.) hybrids

Archives of Agronomy and Soil Science ◽

10.1080/03650340.2014.943198 ◽

2014 ◽

Vol 61 (4) ◽

pp. 493-506 ◽

Cited By ~ 13

Author(s):

Maryam Goodarzian Ghahfarokhi ◽

Syrus Mansurifar ◽

Ruhollah Taghizadeh-Mehrjardi ◽

Mohsen Saeidi ◽

Amir Mohammad Jamshidi ◽

...

Keyword(s):

Drought Stress ◽

Water Content ◽

Relative Water Content ◽

Antioxidant Systems ◽

Growth Stages ◽

Relative Water ◽

Effects Of Drought ◽

Different Growth Stages

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SCREENING RICE (Oryza sativa L.) GENOTYPES FOR RESISTANCE AGAINST DROUGHT

Water Conservation and Management ◽

10.26480/wcm.02.2020.78.82 ◽

2020 ◽

Vol 4 (2) ◽

pp. 78-82

Author(s):

Mohd Syahmi Salleh ◽

Ris Amirah Malek ◽

Rozilawati Shahari ◽

Mohd Shukor Nordin

Keyword(s):

Drought Stress ◽

Plant Height ◽

Root Length ◽

Selection Criterion ◽

Proline Content ◽

Yield Potential ◽

Growth Stages ◽

Physiological Basis ◽

Drought Tolerant ◽

Rice Genotypes

Drought is regarded as one of the limiting factors in rice production nationally and globally. The present study was conducted to study morpho-physiological and biochemical responses of rice genotypes to drought stress, to identify potential traits for use as a selection criterion in breeding drought-tolerant rice at seedling stage and finally to identify rice genotype resistant to drought stress for use as parents in future breeding. The experimental design used was a split-plot design with three replications, with drought stress as the main plot and rice genotypes as the sub-plot. The main plots consisted of control (normal irrigation) and drought stress. The sub-plots consisted of twelve rice genotypes namely Apami (V1), Boewani (V2), Basmati 370 (V3), Cica- 4 (V4), Dular (V5), Jarom mas (V6), Kalarata (V7), Biris (V8), Haiboq (V9), Moroberekan (V10), MR 297 (V11) and Aerob 1 (V12). Results showed that drought stress led to a decrease in plant height, leaves size, root length, total dry weight, and number of leaves but an increment in proline content. The genotype Apami and Kalarata were found to accumulate higher proline content indicating potential resistant ability towards drought stress. Dular and Aerob1, along with tolerant control genotype, Moroberekan, on the other hand, recorded a lower SES score. Leave size, root length, and plant height could also be used as a selection criterion in breeding drought-tolerant rice due to high values of broad-sense heritability and genetic advance by percentage of mean (GAM). Nevertheless, further study on the genetics and physiological basis of tolerant ability at reproductive growth stages are necessary in order to assess grain yield potential of the potentially tolerant genotype reported in this study.

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Identification of Promising Genotypes Through Systematic Evaluation for Arsenic Tolerance and Exclusion in Rice (Oryza sativa L.)

Frontiers in Plant Science ◽

10.3389/fpls.2021.753063 ◽

2021 ◽

Vol 12 ◽

Author(s):

Varunseelan Murugaiyan ◽

Jauhar Ali ◽

Michael Frei ◽

Frederike Zeibig ◽

Ambika Pandey ◽

...

Keyword(s):

Oryza Sativa L ◽

Systematic Evaluation ◽

Arsenic Content ◽

Growth Stages ◽

World Population ◽

Breeding Programs ◽

Rice Germplasm ◽

Rice Genotypes ◽

As Stress ◽

Different Growth Stages

Rice remains a major staple food source for the rapidly growing world population. However, regular occurrences of carcinogenic arsenic (As) minerals in waterlogged paddy topsoil pose a great threat to rice production and consumers across the globe. Although As contamination in rice has been well recognized over the past two decades, no suitable rice germplasm had been identified to exploit in adaptive breeding programs. Therefore, this current study identified suitable rice germplasm for As tolerance and exclusion based on a variety of traits and investigated the interlinkages of favorable traits during different growth stages. Fifty-three different genotypes were systematically evaluated for As tolerance and accumulation. A germination screening assay was carried out to identify the ability of individual germplasm to germinate under varying As stress. Seedling-stage screening was conducted in hydroponics under varying As stress to identify tolerant and excluder genotypes, and a field experiment was carried out to identify genotypes accumulating less As in grain. Irrespective of the rice genotypes, plant health declined significantly with increasing As in the treatment. However, genotype-dependent variation in germination, tolerance, and As accumulation was observed among the genotypes. Some genotypes (WTR1-BRRI dhan69, NPT-IR68552-55-3-2, OM997, and GSR IR1-5-Y4-S1-Y1) showed high tolerance by excluding As in the shoot system. Arsenic content in grain ranged from 0.12 mg kg−1 in Huang-Hua-Zhan (indica) from China to 0.48 mg kg−1 in IRAT 109 (japonica) from Brazil. This current study provides novel insights into the performance of rice genotypes under varying As stress during different growth stages for further use in ongoing breeding programs for the development of As-excluding rice varieties for As-polluted environments.

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