Characterization of Maize Hybrids (Zea mays L.) for Salt Tolerance at Seedling Stage

Ali, Muhammad Ubaid; Abbasi, Ghulam Hassan; Jamil, Moazzam; Raza, Muhammad Aown Sammar; Ahmad, Sayeed

doi:10.52763/pjsir.biol.sci.64.2.2021.160.166

Cited by 3 publications

(2 citation statements)

References 21 publications

(22 reference statements)

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“…Under the influence of salt stress, plants tend to accumulate more Na + than K + in the shoot and roots tissues. Whereas, the salt tolerant genotypes retain lower Na + and maintained higher levels of K + in the plant body thereby leading to higher K + /Na + ratio (65,37,30), which is very much consistent with our findings (Table -10). In short summary, the current study provided scientific information to the breeders to boost the development process of new, more productive and better adapted maize cultivars.…”

Section: Discussionsupporting

confidence: 91%

Characterizing Maize Genotypes for Salt Tolerance Using Morphological and Ionic Traits at Seedling Stage

Hussain

Rasheed

Ahmed

et al. 2023

ILNS

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Maize crop is the third most important cereal crop, mostly grown for food, feed and fodder purpose. In spite of the fact the crop is susceptible to salt stress but exhibits a considerable genotypic variability for salt tolerance. The present study was carried out to determine to which extent the maize genotypes with contrasting morphological traits respond to salt stress. Seven days old seedlings of thirty maize genotypes were exposed to NaCl stress of EC less than 4 (control), equal to 8 and 12 dS m-1 for further 28 days in a temperature controlled greenhouse. The salt stress imposition was completed in two increments every other day from the date of planting. At the age of 35 days, the seedlings were evaluated for contrasting morphological traits. The genotypes exhibited considerable variations for each of the 10 measured morphological and ionic traits. PCA was employed to identify the most suitable morphological trait to be used as selection criterion for salt tolerance. Based on the PCA results, dry shoot weight (DSW) was used to classify thirty maize genotypes into salt-tolerant-T, moderately tolerant-MT and salt sensitive-S groups. Two (2) out of thirty genotypes i.e. SB-9617 and FH-949 had the highest average of percent dry shoot weight (PDSW) values > 70% were classified as salt tolerant (T). The fifteen (15) genotypes showed average of PDSW values in the range of 55-69.9 % were classified as moderately tolerant (MT) by indicating the sequence order of salt tolerance as YH-1898 > MMRI-yellow > S-2002 > FH-988 > FH-1292 > HC-12 > MS-2018 > NCEV-1270-7 > Pahari > Pearl White > FH-1114 > NCEV-1270-3 > Iqbal > NCEV-1297 > DK-6724. However, thirteen (13) out of total thirty (30) genotypes attained the average PDSW values <55% were classified as salt sensitive (S) following the sequence order as NCEV-1530-9 > Composite > FRI-22 > Azam > MS-2015 > P-1543 > Neelum > Afgoi > Malka-2016 > MS-1501 > HNG > NCEV-1270-5 > NCEV-7004. It was also noticed that the declared salt tolerance was positively correlated with dry shoot weight (DSW), shoot length (SL), stem diameter (SD), fresh shoot weight (FSW), fresh root weight (FRW), dry roots weight (DRW), root length (RL), leaf area per plant (LA), number of leaves per plant (NL) and K+/Na+ ratio. The highest positive Pearson correlation coefficients were determined in LA vs SD (r=0.900), DSW vs SD (r=0.899), SL vs DSW (r=0.891), SL vs FSW (r=0.890) and DSW vs FSW (r=0.887). Additionally, the salt tolerant (T) group of genotypes maintained higher K+/Na+ ratios compared to moderately tolerant (MT) and salt sensitive (S) groups. The results clearly showed that dry shoot weight (DSW) could be viable option to classify maize genotypes into different salt tolerance groups and to identify the most suited and best adapted salt tolerant genotype for cultivation in saline soils. Furthermore, this scientific information could help the plant scientists to improve and develop the new salt tolerant cultivar.

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Section: Discussionsupporting

confidence: 91%

Characterizing Maize Genotypes for Salt Tolerance Using Morphological and Ionic Traits at Seedling Stage

Hussain

Rasheed

Ahmed

et al. 2023

ILNS

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“…Egypt depends on limited water resources from the Nile River (55 billion m 3 of water/year) ( MWRI, 2014 ). Over 95% of irrigated lands in Egypt are managed using surface irrigation (SI) systems, with a low irrigation efficiency of 45–50% ( Osman et al, 2016 ; Abdou et al, 2021 ; Ali et al, 2021 ). Therefore, rational water governance seeks to reduce water losses and enhance crop productivity to withstand high evaporative demand.…”

Section: Introductionmentioning

confidence: 99%

Exogenously Applied Proline Enhances Morph-Physiological Responses and Yield of Drought-Stressed Maize Plants Grown Under Different Irrigation Systems

et al. 2022

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The exogenous application of osmoprotectants [e.g., proline (Pro)] is an important approach for alleviating the adverse effects of abiotic stresses on plants. Field trials were conducted during the summers of 2017 and 2018 to determine the effects of deficit irrigation and exogenous application of Pro on the productivity, morph-physiological responses, and yield of maize grown under two irrigation systems [surface irrigation (SI) and drip irrigation (DI)]. Three deficit irrigation levels (I100, I85, and I70, representing 100, 85, and 70% of crop evapotranspiration, respectively) and two concentrations of Pro (Pro1 = 2 mM and Pro2 = 4 mM) were used in this study. The plants exposed to drought stress showed a significant reduction in plant height, dry matter, leaf area, chlorophyll content [soil plant analysis development (SPAD)], quantum efficiency of photosystem II [Fv/Fm, Fv/F0, and performance index (PI)], water status [membrane stability index (MSI) and relative water content (RWC)], and grain yield. The DI system increased crop growth and yield and reduced the irrigation water input by 30% compared with the SI system. The growth, water status, and yield of plants significantly decreased with an increase in the water stress levels under the SI system. Under the irrigation systems tested in this study, Pro1 and Pro2 increased plant height by 16 and 18%, RWC by 7 and 10%, MSI by 6 and 12%, PI by 6 and 19%, chlorophyll fluorescence by 7 and 11%, relative chlorophyll content by 9 and 14%, and grain yield by 10 and 14%, respectively, compared with Pro0 control treatment (no Pro). The interaction of Pro2 at I100 irrigation level in DI resulted in the highest grain yield (8.42 t ha–1). However, under the DI or SI system, exogenously applied Pro2 at I85 irrigation level may be effective in achieving higher water productivity and yield without exerting any harmful effects on the growth or yield of maize under limited water conditions. Our results demonstrated the importance of the application of Pro as a tolerance inducer of drought stress in maize.

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Morpho-Physiological Attributes of Different Maize (Zea mays L.) Genotypes Under Varying Salt Stress Conditions

et al. 2022

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Characterization of Maize Hybrids (Zea mays L.) for Salt Tolerance at Seedling Stage

Cited by 3 publications

References 21 publications

Characterizing Maize Genotypes for Salt Tolerance Using Morphological and Ionic Traits at Seedling Stage

Characterizing Maize Genotypes for Salt Tolerance Using Morphological and Ionic Traits at Seedling Stage

Exogenously Applied Proline Enhances Morph-Physiological Responses and Yield of Drought-Stressed Maize Plants Grown Under Different Irrigation Systems

Morpho-Physiological Attributes of Different Maize (Zea mays L.) Genotypes Under Varying Salt Stress Conditions

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