Changes in Endogenous Plant Hormones in the Xylem Sap of Grapevines during Development

Niimi, Yoshiyuki; Torikata, Hirotaka

doi:10.2503/jjshs.47.181

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…The filter paper disk bioassay (Zhao et al, 1992) correlates the concentrations of growth regulators substances to their physiological effects on cucumber cotyledon root formation (auxin) and fresh weight variations (kinetin). The presences of several plant hormones in the xylem sap have been displayed on herbaceous and woody plants including grapevine (Niim & Torikata, 1978). In our research, the higher auxin and kinetin like activity was detected on diseased vines.…”

Section: Discussionsupporting

confidence: 54%

Physiological response of ‘Italia’ grapevine to some “Esca complex”-associated fungi

Bruno

Ippolito

Bragazzi

et al. 2020

Preprint

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This study investigated some physiological features in a 20-year-old 'Italia' vineyard cropped in Apulia, Italy. Five vines with brown-wood-streaking associated to Phaeoacremonium minimum (sin. Pm. aleophilum) and Phaeomoniella chlamydospora (BWSV), five with brown-wood-streaking and white-rot caused by Fomitiporia mediterranea (BWSWRV) and five healthy vines (HV) were surveyed. Bleeding xylem sap (BXS) collected at bud-break, symptomless and symptomatic leaves taken during stretched-out leaves, fruit setting, cluster closing and bunch ripening phenological phases were characterized. BXS from HV showed the highest total ascorbic acid level, while BWSWRV had the highest viscosity coefficient, glutathione concentration and growth regulators activity. Low fresh and dry weight, total chlorophyll concentration and the hight leaf surface, hydrogen peroxide and cell membranes damage were detected in leaves of diseased vines. Symptomless and symptomatic leaves of BWSV and BWSWRV exhibited low concentrations of ascorbic acid, reduced glutathione and redox state; moderate levels of dehydroascorbic acid and oxidized glutathione. Higher dehydroascorbate reductase and low ascorbate free radical reductase and glutathione reductase activities were showed by leaves collected from diseased vines. However, no differences were detected in ascorbate peroxidase activity. The decrease of oxidative status alters cell membranes integrity and could contribute to cell death and symptoms development on leaves.

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Section: Discussionsupporting

confidence: 54%

Physiological response of ‘Italia’ grapevine to some “Esca complex”-associated fungi

Bruno

Ippolito

Bragazzi

et al. 2020

Preprint

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“…The presence of several plant hormones in host xylem sap has been assessed in herbaceous and woody plants, including grapevine (Niim and Torikata, 1978). In the present study the greatest auxin-and kinetin-like activities were detected in diseased vines.…”

Section: Discussionmentioning

confidence: 51%

Physiological responses of ‘Italia’ grapevines infected with Esca pathogens

Bruno

Ippolito

Mannerucci

et al. 2021

Phytopathol. Mediterr.

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Physiological features were examined of a 20-year-old Vitis vinifera ‘Italia’ table grape vineyard cropped in Apulia, Italy. Healthy vines with no foliar symptoms and any indications of wood or berry alterations, vines with natural wood infections by Phaeoacremonium minimum (syn. P. aleophilum) and Phaeomoniella chlamydospora showing brown wood streaking symptoms, and vines naturally infected with P. minimum, P. chlamydospora and Fomitiporia mediterranea with brown wood streaking and white rot symptoms, were surveyed. Bleeding xylem sap, collected at bud-break from healthy vines showed the greatest total ascorbic acid level, while vines with brown wood streaking and white rot had the greatest viscosity coefficient, glutathione concentration, and plant growth regulator activities. Compared to healthy vines, leaves of wood affected vines, sampled during the unfolded leaf, fruit setting, cluster closing and bunch ripening vine growth stages, had reduced fresh and dry weights, total chlorophyll concentrations, and increased leaf surface area. Low ascorbic acid and reduced glutathione concentrations, weak redox state, and moderate levels of dehydroascorbic acid and oxidized glutathione were also detected in these vines. Analyses also detected reduced activities of dehydroascorbate reductase, ascorbate free radical reductase and glutathione reductase in diseased vines. The cell membrane damage, associated with lipid peroxidation, was coupled with high hydrogen peroxide concentrations. These changes could contribute to the cell death of leaves and foliar symptom development. The ascorbate-glutathione cycle supports grapevine susceptibility to Esca complex-associated fungi.

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“…Actually it involves many other endogenous compounds, being more associated with a hormone balance. Adjustment of plant hormones concentrations were also reported during flowering and vegetative growth of grapevines (Niimi and Torikata, 1978). Between winter and spring, the increase of temperature and mainly the starting of longer photoperiods can be, somehow, percepted by phytochromes, and there is a complex biochemical signal system that eventually ends up with increasing of GA and decreasing of ABA (Taiz, 2002c).…”

Section: Resultsmentioning

confidence: 99%

Rooting of healthy and CVC-affected 'Valência' sweet orange stem cuttings, through the use of plant regulators

Habermann

Alvarez

Modesto

et al. 2006

Braz. arch. biol. technol.

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Citrus variegated chlorosis (CVC) is a disease caused by Xylella fastidiosa. Using different concentrations of plant regulators, such as auxins (indole-3-butyric acid) and gibberellic acid biosynthesis-inhibitor (paclobutrazol), physiological rooting capacity of healthy and CVC-affected stem cuttings were evaluated in order to investigate the importance of plant hormone imbalance and xylem occlusion in plants with CVC. The percentages of dead, alive and rooted cuttings, cuttings with callus and mean number of roots per cuttings did not show statistical differences in response to

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Changes in Endogenous Plant Hormones in the Xylem Sap of Grapevines during Development

Cited by 8 publications

References 27 publications

Physiological response of ‘Italia’ grapevine to some “Esca complex”-associated fungi

Physiological response of ‘Italia’ grapevine to some “Esca complex”-associated fungi

Physiological responses of ‘Italia’ grapevines infected with Esca pathogens

Rooting of healthy and CVC-affected 'Valência' sweet orange stem cuttings, through the use of plant regulators

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