Effects of ultraviolet-B irradiation on the cuticular wax of cucumber (Cucumis sativus) cotyledons

Fukuda, Satoshi; Satoh, Atsushi; Kasahara, Hirofumi; Matsuyama, Hidetoshi; Takeuchi, Yuichi

doi:10.1007/s10265-007-0143-7

Cited by 41 publications

(22 citation statements)

References 26 publications

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“…Steinmuller and Tevini [64] reported that enhanced UV-B radiation increased wax content by 23% in barley and 28% in bean. Fukuda et al [65] observed an increase in the amount of cuticular wax per unit leaf area by two fold as a result of UV-B radiation in cucumber, suggesting that UV-B acts on the cuticular biosynthetic pathway. Our results strongly suggest that C. citratus plants also protect themselves against UV-B irradiation by developing this stress avoidance mechanism.…”

Section: Discussionmentioning

confidence: 98%

Supplemental UV‐B induced changes in leaf morphology, physiology and secondary metabolites of an Indian aromatic plantCymbopogon citratus(D.C.) Staph under natural field conditions

Kumari

Agrawal

2010

International Journal of Environmental Studies

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Cymbopogon citratus (D.C.) Staph, an aromatic perennial herb, is known to have great potential as a medicinal plant. In our study, we investigated in realistic field conditions the effect of supplemental ultraviolet-B (sUV-B) at two levels (+1.8 and +3.6 kJ m −2 d −1 above ambient) on various growth, physiological and biochemical characteristics of C. citratus. A higher dose of sUV-B produced a 17.6% reduction in biomass while at a lower dose the characteristics remained unaffected. The sUV-B imparted its negative effects to chlorophyll contents while an increment was noticed for carotenoids and phenolic compounds. No significant change in the rate of photosynthesis was noticed. The SEM observation revealed dense waxy deposition on the adaxial surface of exposed leaves at a lower dose of sUV-B to increase epidermal transmittance. This study clearly indicated the beneficial effect of sUV-B on volatile oils production in C. citratus plants grown under a low dose of sUV-B.

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Section: Discussionmentioning

confidence: 98%

Supplemental UV‐B induced changes in leaf morphology, physiology and secondary metabolites of an Indian aromatic plantCymbopogon citratus(D.C.) Staph under natural field conditions

Kumari

Agrawal

2010

International Journal of Environmental Studies

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“…For instance, one of the most important functions for cuticular wax is to protect plants from excessive ultraviolet (UV) light. Many studies showed that elevated UV-B radiation affects plant cuticular wax formation and gas exchange (Jansen et al, 1998; Fukuda et al, 2008; Jiang et al, 2009). It was found that cuticular wax content increases by 20–28% in cucumber ( Cucumis sativus L.), bean ( Phaseolus vulgaris L.), and barley ( Hordeum vulgare L.) when plants are exposed to UV-B light (Steinmüller and Tevini, 1985).…”

Section: Linking Cuticular Wax To Plant Drought Tolerancementioning

confidence: 99%

Molecular and Evolutionary Mechanisms of Cuticular Wax for Plant Drought Tolerance

et al. 2017

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Cuticular wax, the first protective layer of above ground tissues of many plant species, is a key evolutionary innovation in plants. Cuticular wax safeguards the evolution from certain green algae to flowering plants and the diversification of plant taxa during the eras of dry and adverse terrestrial living conditions and global climate changes. Cuticular wax plays significant roles in plant abiotic and biotic stress tolerance and has been implicated in defense mechanisms against excessive ultraviolet radiation, high temperature, bacterial and fungal pathogens, insects, high salinity, and low temperature. Drought, a major type of abiotic stress, poses huge threats to global food security and health of terrestrial ecosystem by limiting plant growth and crop productivity. The composition, biochemistry, structure, biosynthesis, and transport of plant cuticular wax have been reviewed extensively. However, the molecular and evolutionary mechanisms of cuticular wax in plants in response to drought stress are still lacking. In this review, we focus on potential mechanisms, from evolutionary, molecular, and physiological aspects, that control cuticular wax and its roles in plant drought tolerance. We also raise key research questions and propose important directions to be resolved in the future, leading to potential applications of cuticular wax for water use efficiency in agricultural and environmental sustainability.

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“…The cuticular waxes can further help in protecting plants from high light stress [101]. The cuticular wax has a role in protecting plants from excessive ultraviolet (UV) light and there are reports indicating that elevated UV-B radiation can affect plant cuticular wax formation [101,159,160]. Based on the existing information, as mentioned above, cuticular wax, can be treated as the first protective layer and an important trait contributing for both biotic and abiotic stresses.…”

Section: Abiotic Stressesmentioning

confidence: 99%

Leaf Cuticular Wax, a Trait for Multiple Stress Resistance in Crop Plants

Dhanyalakshmi¹,

Soolanayakanahally²,

Rahman³

et al. 2019

Abiotic and Biotic Stress in Plants

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Cuticular waxes form the primary interface between a plant and its external environment. The most important function of this hydrophobic interface is regulation of non-stomatal water loss, gas exchange and conferring resistance to a wide range of biotic as well as abiotic stresses. The biosynthesis, transport and deposition of the cuticular waxes are tightly coordinated by complex molecular networks, which are also often regulated in response to various developmental, biotic as well as abiotic cues. Evidences from model as well as non-model systems suggest that targeted manipulation of the molecular regulators of wax biosynthetic pathways could enhance plant resistance to multiple stresses as well as enhance the post-harvest quality of produce. Under the current scenario of varying climatic conditions, where plants often encounter multiple stress conditions, cuticular waxes is an appropriate trait to be considered for crop improvement programs, as any attempt to improve cuticular traits would be advantageous to the crop to enhance its adaptability to diverse adverse conditions. This chapter briefs on the significance of cuticular waxes in plants, its biosynthesis, transport and deposition, its implication on plant resistance to adverse conditions, and the current options in targeted manipulation of wax-traits for breeding new crop types.Abiotic and Biotic Stress in Plants 2 vegetative and reproductive growth. Some of the abiotic stresses such as drought, high temperature and salinity can influence the occurrence and spread of biotic agents like pathogens, insects, and weeds [1]. In crops like tomato, cucurbits and rice, temperature is one of the most important deciding factors for the occurrence of bacterial diseases [2]. Temperature can also alter the incidence of vector-borne diseases by modifying spread of vectors.But, in their natural environment, plants face combination of stresses, especially under the changing climate scenario. The effect of stresses would be more pronounced under combined (biotic and abiotic) stresses [3], while simultaneous occurrence of abiotic and biotic stresses are more destructive to crop production [4]. Hence, there exists a need now, to look for common traits that can contribute for plant adaptation to such multifarious stressful conditions and sustain crop productivity as well. In this scenario, it is desirable to have a single trait that can confer tolerance to multiple (abiotic and biotic) stresses. Cuticular waxes, a major component of plant cuticle covering all the aerial parts of the plants, can be considered as an important trait for combined stress resistance. Cuticular waxes: a component of plant cuticleThe cuticle is a unique structure developed by land plants during the course of their evolution from an aquatic to a terrestrial lifestyle [5]. The primary role of this lipophilic layer, comprising cutin and cuticular waxes, was to limit non-stomatal water loss by functioning as a physical barrier between the plant surface and its external environment [6]. Development of a...

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Effects of ultraviolet-B irradiation on the cuticular wax of cucumber (Cucumis sativus) cotyledons

Cited by 41 publications

References 26 publications

Supplemental UV‐B induced changes in leaf morphology, physiology and secondary metabolites of an Indian aromatic plantCymbopogon citratus(D.C.) Staph under natural field conditions

Supplemental UV‐B induced changes in leaf morphology, physiology and secondary metabolites of an Indian aromatic plantCymbopogon citratus(D.C.) Staph under natural field conditions

Molecular and Evolutionary Mechanisms of Cuticular Wax for Plant Drought Tolerance

Leaf Cuticular Wax, a Trait for Multiple Stress Resistance in Crop Plants

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