Changes in leaf cuticular waxes of sesame (Sesamum indicum L.) plants exposed to water deficit

Kim, Kwan Su; Park, Si Hyung; Jenks, Matthew A.

doi:10.1016/j.jplph.2006.07.004

Cited by 172 publications

(100 citation statements)

References 22 publications

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“…Previous studies related to drought research in sesame have applied mainly a moderate stress [7,9,10,12,13,[25][26][27], but in fact, in the semi-arid and arid areas where sesame is commonly grown, drought can last several weeks. Hence, in this study, the response of sesame genotypes for long lasting drought stress was emphasized [8,11]. In addition, the originality of the present investigation resides in the fact that (1) it focused on a diverse West and Central African genotypes not yet studied for traits related to drought resistance; and (2) it used an integrated approach by combining agromorphological, physiological, biochemical and seed quality traits to efficiently identify useful genotypes and traits of interest to be targeted for implementing breeding programs in drought-prone environments of West and Central Africa.…”

Section: Discussionmentioning

confidence: 99%

“…However, because the crop is mostly grown under rain fed conditions in arid and semi-arid areas of West and Central Africa, it is often subjected to terminal and intermittent droughts [6]. Despite its relative tolerance to drought stress, severe or prolonged drought is detrimental for the productivity by affecting the number of capsules per plant, grain yield and oil yield and quality as well [7][8][9][10][11][12][13]. Therefore, identifying drought resistant genotypes is of utmost importance for sesame breeding programs in West and Central Africa [14].…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

et al. 2017

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Abstract:Sesame is an important crop in West and Central Africa playing a role of an alternative cash crop for smallholders. However, sesame productivity is highly impaired by drought. This study aimed at identifying some drought-resistant genotypes and efficient screening traits in large sesame germplasm. Ten genotypes were examined based on 21 biochemical, physiological, agromorphological and seed quality traits under three weeks of water stress. A high variability for drought resistance was observed among the genotypes. The genotypes WC17, WC18 and WC14 were drought resistant, WC12, WC13, WC06 and WC03 were moderately drought resistant while, WC02, WC10 and WC08 were drought sensitive, based on principal component analysis. The resistant genotypes exhibited both avoidance and tolerance features including increase of the root system, reduced water loss, highest activity of antioxidative enzymes and accumulation of proline. They produced higher biomass and had higher ability to maintain seed quality under drought stress compared with the sensitive genotypes. Strong accumulation (~200% ratio stress/control) of biochemical markers including superoxide dismutase, ascorbate peroxidase, catalase and proline could be regarded as an important indicator for selecting drought resistant genotypes. This study represents a reference for future research towards developing new varieties with improved drought resistance in West and Central Africa.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

et al. 2017

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“…A rapid decrease of leaf water potential was found in pot-grown strawberry plants under water deficit (Blanke and Cooke, 2006). In field studies, fruit yields of strawberry failed under soil waterdeficit conditions (Krüger et al, 2002;Liu et al, 2007;Terry et al, 2007;Kim et al, 2007). Previous reports found many changes in physiology and biochemistry of strawberry in response to stress.…”

Section: Introductionmentioning

confidence: 97%

Proline, Sugars, and Antioxidant Enzymes Respond to Drought Stress in the Leaves of Strawberry Plants

Sun¹,

Li²,

Hu³

et al. 2015

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Drought is a severe abiotic stress that affects global crop production. A drought model was created for 'Toyonoka' Fragaria × ananassa, and the effects of drought stress on contents of proline, sugars, and antioxidant enzyme activities were investigated. Strawberry transplants with identical growth were chosen for the experiments and the randomized design included four replications (10 plants per block). The experimental sets differed in the moisture level of the culture medium relative to the range of moisture content as follows: control, 70-85%; mild drought stress, 50-60%; moderate drought stress, 40-50%; and severe drought stress, 30-40%. Drought stress was imposed by limiting irrigation. Plants were sampled and physiological parameters were measured on 0, 2, 4, 6, 8, and 10 days after the commencement of drought stress. The water potential of strawberry leaves decreased in the plants under mild, moderate, and severe stress during the course of the water stress treatment and exhibited a significant difference from the control. Strawberry leaves subjected to drought stress had higher accumulation of proline, sugars, and malondialdehyde, and higher activities of superoxide dismutase, peroxidase, and catalase than leaves of control plants. Malondialdehyde levels increased in parallel with the severity and duration of drought stress. By contrast, antioxidant enzyme activity displayed dynamic responses to drought stress, first increasing and subsequently decreasing as the severity and duration of drought stress increased. These results suggest that strawberry plants respond to drought stress by altering the activities of antioxidant enzymes and the levels of osmotically active metabolites. These biochemical response changes may confer adaptation to drought stress and improve the capacity of plants to withstand water-deficit conditions.

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“…Chemical composition data of cuticular waxes sometimes are used for environmental (e.g., Kim et al 2007) and taxonomic considerations (e.g., Eglinton et al 1962;Tulloch 1981;Salatino et al 1989;Avato et al 1990;Vioque et al 1996).…”

Section: Extraction Purification and Chemical Analysismentioning

confidence: 99%

Características micromorfológicas e químicas das ceras cuticulares de Cleistes (Orchidaceae, Pogonieae)

2008

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-[Micromorphological and chemical characteristics of cuticular waxes of Cleistes (Orchidaceae, Pogonieae)]. Micromorphology of cuticular waxes of leaves of 13 species of South American Cleistes Rich. ex Lindl. (Vanilloideae: Pogonieae) were observed by scanning electron microscopy. Chemical constituents of the waxes of eleven species were identified by gas chromatography. The observations were carried out with individuals of native populations occurring in South, Southeastern, Northeastern and Central-Western Brazil. The micromorphology of the cuticular waxes varied from amorphous deposits to parallel stacked platelets. The latter morphological pattern seems to be more common in plants from dryer habitats. Alkyl acids are predominant constituents of waxes of most species. Alkyl alcohols predominate in other species and alkanes are predominant in only one of the studied species. Alkyl esters, monoglycerides and sterols are minor compounds, having not been detected in some species. Either hexadecanoic or octadecanoic are main homologues of alkyl acids; regarding alkyl alcohol homologue distribution, hexacosanol, octacosanol and triacontanol predominates; pentacosane, heptacosane, octacosane, nonacosane and hentriacontane predominate in alkane homologue distributions. No correlation exists between chemical composition and micromorphology of the wax deposits. Stomata distribution restricted to the adaxial or on both foliar surfaces, morphology of wax deposits and chemical composition do not correlate with molecular phylogeny. On the other hand, all these attributes may be useful for species characterization and distinction between species.Resumo -[Características micromorfológicas e químicas das ceras cuticulares de Cleistes (Orchidaceae, Pogonieae)]. A micromorfologia das ceras cuticulares em folhas de 13 espécies de Cleistes Rich. ex Lindl. (Vanilloideae: Pogonieae) sul-americanas foram observadas com o auxílio de um microscópio eletrônico de varredura. Os componentes químicos das ceras epicuticulares de 11 espécies foram identificados por cromatografia gasosa. Todas as análises foram feitas com amostras coletadas no campo, a partir de populações nativas, nas regiões sul, sudeste, nordeste e centro-oeste do Brasil. A micromorfologia das ceras epicuticulares variou desde depósitos amorfos até pequenas placas paralelamente orientadas. A presença de ceras epicuticulares formando placas é mais comum em plantas que ocorrem em ambientes secos. Ácidos alquílicos são os principais constituintes das ceras epicuticulares da maioria das espécies do gênero. Álcoois alquílicos predominam em outras espécies e alcanos são os principais constituintes das ceras de uma das espécies. Ésteres alquílicos, mono-glicerídeos e esteróis são encontrados em pequenas quantidades, e não estão presentes em todas as espécies. O ácido hexadecanóico ou o octadecanóico são os homólogos principais de ácidos alquílicos; em relação à distribuição de álcoois alquílicos, predominam octacosanol e triacontanol; pentacosano, heptacosano, octacosa...

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Changes in leaf cuticular waxes of sesame (Sesamum indicum L.) plants exposed to water deficit

Cited by 172 publications

References 22 publications

Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

Comprehensive Screening of Some West and Central African Sesame Genotypes for Drought Resistance Probing by Agromorphological, Physiological, Biochemical and Seed Quality Traits

Proline, Sugars, and Antioxidant Enzymes Respond to Drought Stress in the Leaves of Strawberry Plants

Características micromorfológicas e químicas das ceras cuticulares de Cleistes (Orchidaceae, Pogonieae)

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