Physiology of Rice Tungro Virus Disease: Involvement of Abscisic Acid‐Like Substance in Susceptible Host‐Virus Interactions

Mohanty, S. K.; Mohanty, Santosh Kumar; Anjaneyulu, A.; Sridhar, R.

doi:10.1111/j.1399-3054.1979.tb01677.x

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…Increases of proline in the leaves of tungro-diseased plants thus occurs in the absence of external water stress. Furthermore, ABA-like activity substantially increases in leaves of a RTV sensitive rice cultivar in response to the virus infection (Mohanty et al, 1979), This suggests that proline increase is mediated by ABA, whose endogenous concentration may increase, presumably due to the trigger from the virus-induced internal water stress. Indeed, also enhanced leaf senescence, inhibition of transpiration (Mohanty et al, 1979) and…”

Section: Resultsmentioning

confidence: 95%

“…slowed down the proline accumulation, ABA synthesized in response to virus infection mediates proline accumulation in the tungro disease syndrome, since rice cuitivars varying in their reaction to RTV differed in their efficiency to synthesize ABA-Hke substances when infected with RTV (Mohanty et al, 1979), However, the sensitivity of our rice cultivars to the virus, and their ability to gain proline during normal senescence or during senescence accelerated by exogenous ABA (2 X lO^M), are evidently not correlated with each other.…”

Section: Cultivarmentioning

confidence: 83%

“…In response to drought (Singh et al, 1972, Blum and Ebercon 1976, Boggess et al, 1976, salt (Stewart and Lee 1974, Ciiu et al, 1976, Cavalieri and Huang 1979 and tetnperature (Chu et .al, 1974(Chu et .al, ,1978 stresses, plants synthesize and accumulate very high levels of proline in leaves. Occurrence of proline and its analogue pipecolic acid in certain vims diseased plant tissues at relatively high concentrations has also been noticed (Diener 1963), Exogenous abscisic acid (ABA) stimulates proline accumulation (Aspinall et al, 1973, Rajagopal and Andersen 1978, Stewart 1980 and has pronounced effects on leaf senescence and transpiration (Addicott andLyon 1969, Milborrow 1974), ABA accumulates in water-stressed leaves (Wright 1969) and has been associated with drought resistance in maize and Sorghum (Larqae-Saavedra and Wain 1976), Predictably, manifestation of leaf senescence, a process triggered by in-creases in endogenous ABA levels (Thomas and Stoddart 1980), might also lead to proline accutnulation, A previous study (Mohanty et al, 1979) indicated that rice plants infected by leafhopper-transmitted tungro virus (RTV) contained more abscisic acid-like substance than the healthy plants, Tungro infestation is manifested by distinct stunting of the plants and severe leaf yellowing, indicating premature and accelerated leaf senescence, inhibition of transpiration, and acctimulation of starch in the leaves (Sridhar et ai, 1976, Mohanty et al, 1979, The similarities in morphological and physiological characteristics between drought and tungro-infected plants led us to surmise that the stress induced by abiotic environmental factors, particularly drought, and a biotic factor like tungro virus are mediated by a common factor, possibly ABA, If correct, this hypothesis would predict a characteristic prohne accumulation mediated by ABA in the disease-stressed plant tissue.…”

Section: Introductionmentioning

confidence: 99%

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Physiology of rice tungro virus disease: Proline accumulation due to infection

Mohanty

Sridhar

1982

Physiologia Plantarum

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Tungro virus infection stimulates proline accumulation in leaves of rice (Oryza sativa L.), especially in a sensitive cultivar, Taichung Native 1. Disease‐induced proline accumulation increases with the severity of the disease. Proline also accumulates in senescing, detached healthy rice leaves. The magnitude of proline accumulation in these leaves was further accentuated by ABA and retarded by kinetin. In the absence of drought stress, virus infection induces severe symptoms (stunting) in a drought tolerant cultivar (Lalnakanda 41) when compared to cultivars with intermediate (MW 10) and high sensitivity (Cauvery) to drought. Thus tungro virus mimics water stress in inducing proline accumulation in rice leaves. In both cases a common factor, ABA, may mediate proline accumulation. In drought stress, proline accumulation is associated with tolerance, while in virus stress, proline accumulation is connected with sensitivity. It is, therefore, clear that proline cannot always act to relieve physiological stress.

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Section: Resultsmentioning

confidence: 95%

Section: Cultivarmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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Physiology of rice tungro virus disease: Proline accumulation due to infection

Mohanty

Sridhar

1982

Physiologia Plantarum

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“…Measurements of the (3-inhibitor complex of growthretarding substances, of which ABA is a major component (132), showed unchanged activity after TMV infection of tobacco (132), but increased activity in PMV-infected lupin (151) and rice tungro virus (RTV)-infected rice (95) . In experiments where ABA was measured by physical methods, infection of cucumber with cucumber mosaic virus (CMV) was reported to cause no change (9), but other workers reported a three-fold increase (1) .…”

Section: A Bscisic Acidmentioning

confidence: 99%

Plant growth regulators and virus infection: A critical review

Fraser¹,

Whenham²

1982

Plant Growth Regul

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Virus infection can severely inhibit plant growth and distort development . This article reviews changes in plant growth regulator metabolism caused by infection . In general, virus infection decreases auxin and gibberellin concentrations and increases abscisic acid concentration . Ethylene production is stimulated in necrotic or chlorotic reactions to infection, but not where the virus spreads systemically without necrosis . While these broad trends are true for most host-virus combinations studied, several situations are recorded where the virus had other effects on growth substance concentration . Cytokinin changes do not show any common pattern : both increases and decreases after infection have been reported .The extent to which virus-induced changes in growth substance concentration could be responsible for observed alterations in host growth and development is discussed . While changes in abscisic acid, gibberellin and ethylene production seem potentially important, the experimental evidence does not provide conclusive proof for control of growth by these changes .The numerous investigations of effects of exogenous regulators on virus multiplication and pathogenesis are reviewed . Different regulators, or the same regulator applied at different times or concentrations, had very diverse effects, and in some cases did significantly alter virus multiplication and pathogenesis . However, such studies seem to have yielded disappointingly little understanding of the biochemistry of the host-virus interaction, and the possible involvement of growth substances in this .Possible uses of plant growth regulators in chemotherapy of virus disease, and their possible involvement in natural or induced resistance mechanisms are discussed .

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“…Salicylic acid and jasmonic acid/ethylene orchestrate response against (hemi)biotrophic pathogens and necrotrophic pathogens, respectively. The fi rst study suggestive of the involvement of ABA in disease response came in 1979 (Mohanty et al 1979 ) where bioassays revealed a significantly higher ABA-like activity from the extracts of the rice tango virus (RTV)-infected susceptible rice cultivar than that of the less-susceptible cultivar. There were studies that reported that ABA negatively affects the disease resistance (Rezzonico et al 1998 ;McDonald and Cahill 1999 ;Audenaert et al 2002 ).…”

Section: Role Of Aba In Biotic Stress Tolerance Of Plantsmentioning

confidence: 99%

ABA Receptors: Prospects for Enhancing Biotic and Abiotic Stress Tolerance of Crops

Dalal

Chinnusamy

2015

Elucidation of Abiotic Stress Signaling in Plants

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The plant stress hormone abscisic acid (ABA) regulates myriad of plant developmental programs such as germination, root development, vegetative growth, seed development, dormancy, and seed desiccation tolerance. ABA, the master controller of transpiration, regulates ion channels and gene expression that are necessary for abiotic stress tolerance of plants and hence popularly called as the plant stress hormone. In the past one decade, the role of ABA in regulation of biotic stress tolerance is emerging. In response to low leaf water status as well as pathogen-associated molecular pattern (PAMP) signaling, ABA induces closure of stomata, which are major gateways of pathogens entry into plant cells. Salicylic acid (SA) promotes systemic acquired resistance (SAR) to biotrophic lifestyle, while jasmonic acid (JA) and ethylene positively regulate induced systemic resistance (ISR) against necrotrophic pathogens and insects. In addition to its role in PAMP-mediated stomatal closure, ABA interacts synergistically or antagonistically with SA, JA, and ethylene to regulate disease resistance pathway. Intense efforts made since 1980s have unraveled the molecular details of ABA signaling, culminating with the breakthrough discovery of the START domain proteins PYR/PYL/RCAR as ABA receptors (ABAR) and identifi cation of core components of ABA signaling in 2009. Recent studies have also revealed the critical role of ABA receptors in plant processes such as fruit ripening and secondary metabolite accumulation. Genetic manipulation of ABA signaling is envisaged as a potential tool for enhancing plant development and biotic and abiotic stress tolerance of crops. This chapter focuses on molecular and structural basis of ABA signaling. Further, it explores the potential of genetic engineering of core components, protein engineering to develop orthogonal receptor, and development of novel synthetic agonists of ABARs for improving crop yield, quality, and stress tolerance.

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Physiology of Rice Tungro Virus Disease: Involvement of Abscisic Acid‐Like Substance in Susceptible Host‐Virus Interactions

Cited by 13 publications

References 17 publications

Physiology of rice tungro virus disease: Proline accumulation due to infection

Physiology of rice tungro virus disease: Proline accumulation due to infection

Plant growth regulators and virus infection: A critical review

ABA Receptors: Prospects for Enhancing Biotic and Abiotic Stress Tolerance of Crops

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