Growth, lipid peroxidation and photosynthesis in two tall fescue cultivars differing in heat tolerance

Wang, J. Z.; Cui, Langjun; Wang, Y.; Li, J. L.

doi:10.1007/s10535-009-0045-8

Cited by 71 publications

(59 citation statements)

References 29 publications

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“…With the destruction of the chloroplast structures under high temperature stress, Chl and carotenoid contents existed in the thylakoid membrane were also reduced, as well as their contents were higher in heattolerant 'Zifengyu' than in moderately heat-tolerant 'Hongyanzhenghui'. A similar result was obtained with heat-tolerant and heat-sensitive tall fescue (Wang et al 2009). These differences led to higher photosynthetic rate and transpiration rate in a heat-tolerant cultivar, which ensured normal plant growth and development.…”

supporting

confidence: 82%

“…For example, high temperature stress induced cell membrane injuries in two genotypes of tall fescue (Festuca arundinacea Schreb. ), and the change in MDA content was more pronounced in the heat-tolerant cultivar than in the heat-sensitive cultivar (Wang et al 2009). In the current study, the MDA content gradually increased in 'Zifengyu' and 'Hongyanzhenghui' as the temperature increased, and because the damage of heat-tolerant 'Zifengyu' was less than that of moderately heat-tolerant 'Hongyanzhenghui' under high temperature stress, the increase of the MDA content in 'Zifengyu' was significantly lower than that in 'Hongyanzhenghui', which was consistent with the previous reports (Lv et al 2008;Wang et al 2009).…”

Section: Discussionmentioning

confidence: 90%

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Biochemical and molecular responses of herbaceous peony to high temperature stress

Zhao

Han

et al. 2016

Can. J. Plant Sci.

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To clarify the theoretical basis of the differences in high temperature stress tolerance among herbaceous peony (Paeonia lactiflora Pall.), we investigated the heat injury index of twelve P. lactiflora cultivars. Of these, heat-tolerant 'Zifengyu' and moderately heat-tolerant 'Hongyanzhenghui' were selected to study the biochemical and molecular responses to high temperature stress. 'Zifengyu' had reduced malondialdehyde (MDA) content, increased soluble sugar, chlorophyll (Chl) a, Chl b, Chl a + b. and carotenoid contents, as well as elevated antioxidant enzymes activities, photosynthetic rate (Pn), transpiration rate (Tr) and relatively intact cellular structures compared with 'Hongyanzhenghui', especially when the temperature was the highest. Additionally, we isolated partial cDNAs of two heat shock protein genes (HSP60 and HSP90) from P. lactiflora, which were 880-bp and 1077-bp nucleotides in length, respectively. The expression levels of PlHSP60, PlHSP70 and PlHSP90 were lower in 'Zifengyu' than in 'Hongyanzhenghui' for the first three of four developmental stages examined. These results indicated that heat-tolerant P. lactiflora cultivar could effectively scavenge reactive oxygen species (ROS), protect cellular structures, reduce thermal damage and delay the death of plants by enhancing antioxidant enzymes activities and HSP expression under high temperature stress. These findings provide a theoretical basis for breeding heat-tolerant P. lactiflora cultivars.Key words: herbaceous peony, high temperature stress, physiological mechanism, heat shock protein.Résumé : Afin d'éclaircir les fondements théoriques expliquant la tolérance variable des pivoines de Chine (Paeonia lactiflora Pall.) au stress thermique, les chercheurs ont examiné l'indice des dommages causés par la chaleur de douze cultivars. Parmi ceux-ci, on a retenu les variétés Zifengyu, résistante à la chaleur, et Hongyanzhenghui, modérément tolérante à la chaleur, pour approfondir les réactions biochimiques et moléculaires au stress thermique. Comparativement à Hongyanzhenghui, la variété Zifengyu se caractérise par une plus faible teneur en malondialdéhyde (MDA), une concentration plus élevée de sucres solubles, de chlorophylle (Chl) a, de Chl b, de Chl a + b et de caroténoïdes, ainsi qu'une hausse de l'activité des enzymes antioxydants, du taux de photosynthèse (Pn), du taux de transpiration (Tr) et de la quantité d'organites cellulaires relativement intacts, surtout quand la température atteint un maximum. Par ailleurs, les auteurs ont isolé une partie de l'ADNc des gènes codant deux protéines de choc thermique (HSP60 et HSP90) chez P. lactiflora, dont lalongueur respective est de 880-bp et de 1,077-bp nucléotides. Le taux d'expression des gènes PlHSP60, PlHSP70 et PlHSP90 était plus faible chez Zifengyu que chez Hongyanzhenghui au cours des trois premiers stades de développement sur les quatre examinés. Ces résultats indiquent que le cultivar de P. lactiflora résistant à la chaleur pourrait neutraliser les dérivés réactifs de l'oxygè...

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supporting

confidence: 82%

Section: Discussionmentioning

confidence: 90%

Biochemical and molecular responses of herbaceous peony to high temperature stress

Zhao

Han

et al. 2016

Can. J. Plant Sci.

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“…Under the high temperature stress, the chlorophyll content of tall fescue (Festuca elata) was decreased, cell membrane structure was damaged, and the growth rate was inhibited (Wang et al, 2009), which was similar with P. lactiflora growth status. But after shade treatment, the chlorophyll content of P. lactiflora reduced slowly, photosynthesis enhanced significantly, and soluble sugar content in the late stages was also higher than that of control.…”

Section: Discussionmentioning

confidence: 71%

Shade Ameliorates High Temperature-induced Inhibition of Growth in Herbaceous Peony (Paeonia lactiflora)

Daqiu¹,

ChengXia²,

Zhou³

et al. 2015

IJAB

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High temperature stress has a significant impact on plant growth and development. Herbaceous peony (Paeonia lactiflora Pall.) is a very important landscape plant used in greenbelt whose growth is restrained seriously by high summer temperature, but little is known about relevant solving measures. In order to find an effective measure, this paper studied the effect of black shading net with about 60% transmittance on alleviating the thermal damage of P. lactiflora under field conditions. The results showed that P. lactiflora physiological indices were higher in shaded plants than those in sun-exposured plants especially in the late stages of higher temperature, such as chlorophyll (Chl) a, Chl b, Chl a+b, soluble sugar, soluble protein contents; whereas the exception to the trend was in Chl a/b and malondialdehyde (MDA) content. Moreover, compared with sun exposure, shade increased P. lactiflora protective enzymes activities, made mesophyll cell ultrastructures more intact, the chloroplasts more round and the grana lamellaes arrange relatively neatly, which led to enhance its photosynthesis rate (Pn) and transpiration rate (Tr). Additionally, the full-length cDNA of a heat shock protein gene (HSP70) containing 2195 bp nucleotides was obtained from P. lactiflora, and the expression analysis of PlHSP60, PlHSP70 and PlHSP90 in four developmental stages showed that shade caused PlHSP60 and PlHSP70 expression levels to rise especially in the late stages. These results indicated that shade alleviated the thermal damage of high temperature stress to P. lactiflora through scavenging reactive oxygen species, protecting cell structures, enhancing photosynthesis and the expression levels of HSP under high temperature stress, which might lay a theoretical foundation for P. lactiflora safe over summering and cultivated form in summer.

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“…Los cloroplastos son la fuente más importante de EAO's y por ende, las organelas más susceptibles a ellas frente a situaciones de estrés (Casano & Trippi, 1992;Palatnik et al, 2002). Uno de los indicadores de la presencia de daño oxidativo en los tejidos es el aumento de MDA, intermediario de la peroxidación de lípidos de las membranas celulares (Wang et al, 2009).Por último, podría afirmarse que los cambios metabólicos sufridos por las plantas sometidas a estrés biótico (PS o enfermas con virus), tales como la desorganización de cloroplastos, reducción de clorofilas, incremento del contenido de MDA, son semejantes a los que acontecen durante un proceso de envejecimiento acelerado, notable sobre todo, en plantas infectadas con MRCV que mueren prematuramente sin llegar a florecer en casi su totalidad. Los resultados del análisis complementario del incremento de azúcares solubles totales, almidón, proteínas solubles y MDA y de la disminución del contenido de clorofilas, ambos relativos a plantas sanas, indicaron ausencia de interacción estadísticamente significativa (p> 0,05) entre condición sanitaria y estadio fenológico en que la planta fue tratada.…”

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Alteraciones fisiológicas asociadas a la infección con Mal de Río Cuarto virus (MRCV) y a fitotoxicidad provocada por su insecto vector (Delphacodes kuscheli Fennah) en trigo

Feo¹,

Laguna²,

Biderbost³

2010

Trop. plant pathol.

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RESUMENMal de Río Cuarto virus en trigo provoca una enfermedad resultante de la acción combinada con su principal vector, Delphacodes kuscheli. La severa sintomatología inducida por virus e insecto condujo a determinar la posible existencia de alteraciones fisiológicas en inducida por virus e insecto condujo a determinar la posible existencia de alteraciones fisiológicas en el cultivar de trigo ProINTA Federal, infectado artificialmente con dos aislamientos geográficamente distantes del MRCV y sometido a picadura de insectos no virulíferos, respectivamente, en tres estadios fenológicos. ProINTA Federal fue picado por insectos no virulíferos e inoculado en la primera hoja emergiendo del coleóptilo, en la cuarta y quinta hojas desplegadas, respectivamente. La condición sanitaria de los diferentes tratamientos fue constatada mediante ELISA. Las plantas tratadas manifestaron alteraciones fisiológicas con similares variaciones entre estadios fenológicos. Azúcares solubles totales, almidón y proteínas solubles incrementaron significativamente su contenido en plantas infectadas por MRCV. En plantas PS y con MRCV, el contenido de clorofilas disminuyó marcadamente y lo inverso sucedió con el malondialdehído, lo que indicaría daño oxidativo por estrés en las mismas. No existieron diferencias entre estadios fenológicos y las variaciones de los indicadores de alteraciones fisiológicas considerados, excepto para el incremento de almidón, significativamente superior en plantas inoculadas en la primera hoja emergiendo del coleóptilo. Palabras clave: infección viral, toxicidad por insectos, azúcares solubles, almidón, proteínas, clorofilas, malondialdehído, estadios fenológicos. ABSTRACT Physiological alterations associated to the Mal de Rio Cuarto virus (MRCV) infection and to vector (Delphacodes kuscheli Fennah) phytotoxicity in wheatMal de Río Cuarto virus produces a wheat disease, resulting from the combined action of this pathogen and its main vector, resulting from the combined action of this pathogen and its main vector, from the combined action of this pathogen and its main vector, of this pathogen and its main vector, this pathogen and its main vector, Delphacodes kuscheli. Knowing that viruses and insects cause a severe symptomatology in different genotypes, the objective of this nowing that viruses and insects cause a severe symptomatology in different genotypes, the objective of this severe symptomatology in different genotypes, the objective of this in different genotypes, the objective of this genotypes, the objective of this the objective of this the objective of this of this work was to determine the possible physiological alterations in three phenological stages of wheat (cv ProINTA Federal) inoculated by was to determine the possible physiological alterations in three phenological stages of wheat (cv ProINTA Federal) inoculated by possible physiological alterations in three phenological stages of wheat (cv ProINTA Federal) inoculated by le physiological alterations in three phenological stages of wheat (cv Pro...

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Growth, lipid peroxidation and photosynthesis in two tall fescue cultivars differing in heat tolerance

Cited by 71 publications

References 29 publications

Biochemical and molecular responses of herbaceous peony to high temperature stress

Biochemical and molecular responses of herbaceous peony to high temperature stress

Shade Ameliorates High Temperature-induced Inhibition of Growth in Herbaceous Peony (Paeonia lactiflora)

Alteraciones fisiológicas asociadas a la infección con Mal de Río Cuarto virus (MRCV) y a fitotoxicidad provocada por su insecto vector (Delphacodes kuscheli Fennah) en trigo

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