Response to planting date, stress tolerance and genetic diversity analysis among okra (Abelmoschus esculentus (L.) Moench.) varieties

El-Fattah, Bahaa E. S. Abd; Haridy, A. G.; Abbas, Hassan

doi:10.1007/s10722-019-00821-6

Cited by 16 publications

(11 citation statements)

References 28 publications

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“…Most members of this genus are economically important plants, and used in agriculture, food and medicines. A. esculentus (okra) and A. caillei are widely cultivated as vegetables due to their tender pods [6][7][8]. A. manihot is a popular green leafy vegetable and its flowers have been applied in clinical treatment of burns, chronic kidney disease and oral ulcers owing to the flavonoids [9,10].…”

Section: Introductionmentioning

confidence: 99%

Complete chloroplast genomes of three important species, Abelmoschus moschatus, A. manihot and A. sagittifolius: Genome structures, mutational hotspots, comparative and phylogenetic analysis in Malvaceae

Liu

et al. 2020

PLoS ONE

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Abelmoschus is an economically and phylogenetically valuable genus in the family Malvaceae. Owing to coexistence of wild and cultivated form and interspecific hybridization, this genus is controversial in systematics and taxonomy and requires detailed investigation. Here, we present whole chloroplast genome sequences and annotation of three important species: A. moschatus, A. manihot and A. sagittifolius, and compared with A. esculentus published previously. These chloroplast genome sequences ranged from 163121 bp to 163453 bp in length and contained 132 genes with 87 protein-coding genes, 37 transfer RNA and 8 ribosomal RNA genes. Comparative analyses revealed that amino acid frequency and codon usage had similarity among four species, while the number of repeat sequences in A. esculentus were much lower than other three species. Six categories of simple sequence repeats (SSRs) were detected, but A. moschatus and A. manihot did not contain hexanucleotide SSRs. Single nucleotide polymorphisms (SNPs) of A/T, T/A and C/T were the largest number type, and the ratio of transition to transversion was from 0.37 to 0.55. Abelmoschus species showed relatively independent inverted-repeats (IR) boundary traits with different boundary genes compared with the other related Malvaceae species. The intergenic spacer regions had more polymorphic than protein-coding regions and intronic regions, and thirty mutational hotpots (≥200 bp) were identified in Abelmoschus, such as start-psbA, atpB-rbcL, petD-exon2-rpoA, clpP-intron1 and clpP-exon2.These mutational hotpots could be used as polymorphic markers to resolve taxonomic discrepancies and biogeographical origin in genus Abelmoschus. Moreover, phylogenetic analysis of 33 Malvaceae species indicated that they were well divided into six subfamilies, and genus Abelmoschus was a well-supported clade within genus Hibiscus.

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Section: Introductionmentioning

confidence: 99%

Complete chloroplast genomes of three important species, Abelmoschus moschatus, A. manihot and A. sagittifolius: Genome structures, mutational hotspots, comparative and phylogenetic analysis in Malvaceae

Liu

et al. 2020

PLoS ONE

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“…Since okra shows different susceptibility toward drought at distinct growth stages, the level of yield drop under drought is partially dependent on the timing of the stress. In addition, different cultivars exhibit a wide range of drought tolerance (Abd El-Fattah et al, 2019). Thus, the drought-induced drop in okra is also dependent on the cultivar (Razi et al, 2021).…”

Section: Impact Of Drought On the Growth Of Okramentioning

confidence: 99%

Recent Advances in Okra Responses to Drought

An¹,

Luo²,

Chen³

et al. 2022

mpb

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Drought is a major abiotic stress that can significantly affect seed germination, growth, flowering, and crop yield of okra.Under drought stress, okra plants actively reprogram the gene expression network and adjust the physiological metabolism to maintain growth and development. Characterizing the drought-induced changes at transcriptomic, physiological, and morphological levels should provide valuable information for selective breeding against drought. In this review, we summarize recent advances in drought response in okra and survey the molecular mechanisms underlying drought tolerance.

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“…Okra ( Abelmoschus esculentus [L.] Moench), belonging to the Malvaceae family, is an important crop mainly cultivated as fruits, vegetables and seed oil. It is extensively grown in tropic and subtropic regions [ 1 ] and arid and semi-arid regions with limited and erratic rainfall conditions [ 2 ]. The tender and immature pods of okra are consumed as cooked vegetables [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…This could be due to limited accessions identified as good drought and heat tolerance sources and insect pests and disease resistance [ 15 ]. Some unique accessions, including Sabz Pari [ 16 ], NHAe 47-4 [ 17 ], Pusa Sawari, Iraq P, Hala [ 1 ] and Xianzhi [ 18 ], were identified as useful sources of genes for enhancing drought tolerance under water-limited conditions. Compared to the highest genetic diversity reported in the cultivated okra [ 19 ], the identified accessions with tolerance to drought are relatively few.…”

Section: Introductionmentioning

confidence: 99%

Drought Tolerance Assessment of Okra (Abelmoschus esculentus [L.] Moench) Accessions Based on Leaf Gas Exchange and Chlorophyll Fluorescence

Mkhabela

Shimelis

Gerrano

et al. 2023

Life

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Physiological and complementary phenotypic traits are essential in the selection of drought-adapted crop genotypes. Understanding the physiological response of diverse okra genotypes under drought stress conditions is critical to the selection of drought-tolerant accessions for production or breeding. The objective of this study was to assess the levels of drought tolerance in preliminarily selected okra accessions based on leaf gas exchange and chlorophyll fluorescence to determine best-performing genotypes for drought-tolerance breeding. Twenty-six genetically diverse okra accessions were screened under non-stressed (NS) and drought-stressed (DS) conditions under a controlled glasshouse environment using a 13 × 2 alpha lattice design in three replicates, in two growing seasons. Data were subjected to statistical analyses using various procedures. A significant genotype × water condition interaction effect was recorded for transpiration rate (T), net CO2 assimilation (A), intrinsic water use efficiency (WUEi), instantaneous water use efficiency (WUEins), minimum fluorescence (Fo′), maximum fluorescence (Fm′), maximum quantum efficiency of photosystem II photochemistry (Fv′/Fm′), the effective quantum efficiency of PSII photochemistry (ɸPSII), photochemical quenching (qP), nonphotochemical quenching (qN) and relative measure of electron transport to oxygen molecules (ETR/A). The results suggested variable drought tolerance of the studied okra accessions for selection. Seven principal components (PCs) contributing to 82% of the total variation for assessed physiological traits were identified under DS conditions. Leaf gas exchange parameters, T, A and WUEi, and chlorophyll fluorescence parameters such as the ɸPSII, Fv′/Fm′, qP, qN, ETR and ETR/A had high loading scores and correlated with WUEi, the ɸPSII, qP and ETR under DS conditions. The study found that optimal gas exchange and photoprotection enhance drought adaptation in the assessed okra genotypes and tested water regimes. Using the physiological variables, the study identified drought-tolerant accessions, namely LS05, LS06, LS07 and LS08 based on high A, T, Fm′, Fv′/Fm′ and ETR, and LS10, LS11, LS18 and LS23 based on high AES, Ci, Ci/Ca, WUEi, WUEins, ɸPSII and AES. The selected genotypes are high-yielding (≥5 g/plant) under drought stress conditions and will complement phenotypic data and guide breeding for water-limited agro-ecologies.

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Response to planting date, stress tolerance and genetic diversity analysis among okra (Abelmoschus esculentus (L.) Moench.) varieties

Cited by 16 publications

References 28 publications

Complete chloroplast genomes of three important species, Abelmoschus moschatus, A. manihot and A. sagittifolius: Genome structures, mutational hotspots, comparative and phylogenetic analysis in Malvaceae

Complete chloroplast genomes of three important species, Abelmoschus moschatus, A. manihot and A. sagittifolius: Genome structures, mutational hotspots, comparative and phylogenetic analysis in Malvaceae

Recent Advances in Okra Responses to Drought

Drought Tolerance Assessment of Okra (Abelmoschus esculentus [L.] Moench) Accessions Based on Leaf Gas Exchange and Chlorophyll Fluorescence

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