Maize (Zea mays L.) landraces classified by drought stress tolerance at the seedling stage

Hernández, Víctor A. González; Cruz, Eleazar Lugo; Onofre, L.E Mendoza; Santacruz-Várela, Amalio; Espinosa, Ma. Alejandra Gutiérrez; García, Francisco Zavala

doi:10.9755/ejfa.2021.v33.i1.2356

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…Line-1 (617.2; 584.2 and 0.69), Line-12 (608.7; 586.5 and 0.69) and Line-13 (611.7; 590.5 and 0,70) showed more higher value of MP, GMP and STI. Sayyah et al (2012), Karmani et al (2017 and Poudel et al (2021) reported the similar results and suggested selection based Hernandez et al, 2021). Decreasing yield in low water levels indicates that water is a limiting factor in experiment (Soares et al, 2021).…”

Section: Resultsmentioning

confidence: 71%

Evaluation of wheat (Triticum aestivum L.) lines for drought tolerance in Kyrgyzstan

Venera Karabekovna

2023

Emir J Food Agric

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The study was carried out to explore drought stress indices in F4 hybrid generations of Triticum aestivum L. to select drought stress tolerant lines for rainfed areas of Kyrgyzstan. Wheat is the main food crop in Kyrgyzstan. There are about 0.3 million ha allotted for wheat, more than half of these sown areas (0.2 million ha) are in rainfed farming zones, where the amount of precipitation rarely exceeds 300-400 mm per year. The study was conducted in 2019 at the experimental field of Agricultural Faculty of Kyrgyz-Turkish Manas University. Eighteen hybrid lines of spring wheat and two released varieties (standard) were evaluated under irrigated and non-irrigated conditions. The results of the study show that the mean grain yield of evaluated lines under stress condition as compared to non-stressed condition was decreased by 51.72%. The analysis of correlation coefficient indicated that the productivity of lines under both conditions highly depends from their stress tolerance indexes (STI) (0.769 to 0.928). Tolerance index (TOL) and stress susceptibility index (STI) were negatively correlated (-0.411 to -0.813) with yield of genotypes under stress condition (YS). The correlation between yield stability index (YSI) and yield of genotypes under stress condition (YS) was strongly and highly positive (1.000). Based on provided analysis, Line-1, Line-3, Line-5, Line-12, Line-13, Line-14 and Line-15 were selected as potential genotypes to cultivate in drought areas of Kyrgyzstan and can be used as drought tolerance genetic resources in crop improvement programs. Keywords: Correlation; Drought tolerance; Hybrid lines; Stress tolerance indices; Triticum aestivum L.

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Section: Resultsmentioning

confidence: 71%

Evaluation of wheat (Triticum aestivum L.) lines for drought tolerance in Kyrgyzstan

Venera Karabekovna

2023

Emir J Food Agric

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“…Most importanly, this is the first study to investigate effects of the induced passive heating in seedling emergence, initial growth and chlorophyll fluorescence of native seedling genotypes of maize taking account the three agro-ecological zones of the state of San Luis Potosí. Taking into account that Hernández et al (2021) reported that a solid start to the plant cycle (seedling stage) is critical for achieving a good end performance and a high grain yield. However, high seedling performance alone is insufficient to ensure a good grain production at the conclusion of the cycle.…”

Section: Discussionmentioning

confidence: 99%

Induced Passive Heating on the Emergence, Early Growth and Photochemical Responses of Seedlings of Native Maize (Zea Mays L.) Genotypes From Warm-Dry, Temperate, and Hot and Humid Climates

Idrissa¹,

Ramírez-Tobia²

2022

Emir J Food Agric

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The majority of research on the effects of climate change on maize has concentrated on yield, with only a few studies focusing on seedling emergence and growth. Warmer temperatures predicted as a result of climate change will have an impact on seedlings emergence and growth. An experiment was carried out with induced passive heat with the objective of simulating the increase in temperature in emergence, initial growth and photosynthetical parameters of native genotypes of maize from three different agro-ecological zones (warm-dry, temperate, and hot and humid) climates of San Luis Potosí, México. Two different environments, Open Top Chambers (OTC) and control, were used as treatment and two genotypes for each agro-ecological zone were used. A total of 100 seeds were used in a random design with factorial arrangement for each genotype and environment (OTC and control). Abiotic variables (mean daily temperature, minimum and maximum daily temperature and the accumulated heat units) were determined and compared between the two environments and confirmed that the OTC increased temperatures and heat units. The percentage and velocity of seedling emergence and photochemical quenching (qP) were negatively affected by the effect of induced heat while the rate of growth of plants was accelareted and its plant height was increased. These results reveal dependence on the adaptation of the native genotypes. According to seedling emergence and growth, genotypes from less stress conditions (hot and humid (Huasteca)) were most affected while those from places with major variations in temperature condicions (warm-dry and temperate (Altiplano and Media respectively)) were not. We concluded the effect of induced heat diminish the seedling emergence and photochemical quenching while the growth benefited. Keywords: Climate change; Heat; Open top chamber; Temperature; Zea mays seedling

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“…Recent studies of maize lines by Chen et al. (2016) and Gonzalez-Hernandez et al. (2021) emphasize that the recovery phase influenced the final plant biomass more than the drought phase.…”

Section: Ideotypes and Geneticsmentioning

confidence: 99%

“…comparable to well-watered conditions), e.g., decrease ABA level, and restored fine roots through root regrowth ( Lauenroth et al., 1987 ; Luo, 2010 ; Fang and Xiong, 2015 ; Maurel and Nacry, 2020 ). Although both drought resistance and post-drought recovery are key determinants of plant growth, some recent studies suggest that recovery may play a more significant role in plant drought adaptation than drought resistance itself ( Chen et al., 2016 ; Gonzalez-Hernandez et al., 2021 ). Thus, to increase plant resistance and resilience [For definitions see ( Enright et al., 2014 ; Hoover et al., 2021 )], and maximize plant production, understanding root plasticity during both drought and recovery is necessary ( Vilonen et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Plant root plasticity during drought and recovery: What do we know and where to go?

Zheng

Bochmann²,

Liu³

et al. 2023

Front. Plant Sci.

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AimsDrought stress is one of the most limiting factors for agriculture and ecosystem productivity. Climate change exacerbates this threat by inducing increasingly intense and frequent drought events. Root plasticity during both drought and post-drought recovery is regarded as fundamental to understanding plant climate resilience and maximizing production. We mapped the different research areas and trends that focus on the role of roots in plant response to drought and rewatering and asked if important topics were overlooked.MethodsWe performed a comprehensive bibliometric analysis based on journal articles indexed in the Web of Science platform from 1900-2022. We evaluated a) research areas and temporal evolution of keyword frequencies, b) temporal evolution and scientific mapping of the outputs over time, c) trends in the research topics analysis, d) marked journals and citation analysis, and e) competitive countries and dominant institutions to understand the temporal trends of root plasticity during both drought and recovery in the past 120 years.ResultsPlant physiological factors, especially in the aboveground part (such as “photosynthesis”, “gas-exchange”, “abscisic-acid”) in model plants Arabidopsis, crops such as wheat and maize, and trees were found to be the most popular study areas; they were also combined with other abiotic factors such as salinity, nitrogen, and climate change, while dynamic root growth and root system architecture responses received less attention. Co-occurrence network analysis showed that three clusters were classified for the keywords including 1) photosynthesis response; 2) physiological traits tolerance (e.g. abscisic acid); 3) root hydraulic transport. Thematically, themes evolved from classical agricultural and ecological research via molecular physiology to root plasticity during drought and recovery. The most productive (number of publications) and cited countries and institutions were situated on drylands in the USA, China, and Australia. In the past decades, scientists approached the topic mostly from a soil-plant hydraulic perspective and strongly focused on aboveground physiological regulation, whereas the actual belowground processes seemed to have been the elephant in the room. There is a strong need for better investigation into root and rhizosphere traits during drought and recovery using novel root phenotyping methods and mathematical modeling.

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Maize (Zea mays L.) landraces classified by drought stress tolerance at the seedling stage

Cited by 5 publications

References 14 publications

Evaluation of wheat (Triticum aestivum L.) lines for drought tolerance in Kyrgyzstan

Evaluation of wheat (Triticum aestivum L.) lines for drought tolerance in Kyrgyzstan

Induced Passive Heating on the Emergence, Early Growth and Photochemical Responses of Seedlings of Native Maize (Zea Mays L.) Genotypes From Warm-Dry, Temperate, and Hot and Humid Climates

Plant root plasticity during drought and recovery: What do we know and where to go?

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