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Horticulturae, Free Full-Text

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Horticulturae, Free Full-Text

Higher plants suffer from mild heat stress when temperatures increase by 5 °C above optimum growth temperatures. This produces changes at the cellular and metabolic levels, allowing plants to adapt to heat conditions. This study investigated an increase of 5 °C above the optimum growth temperature (26 °C) of tomato plants in the tomato—Pseudomonas syringae pv. tomato pathosystem. A temperature increase above 26 °C affects plant development, the defensive pathways activated against Pseudomonas syringae pv. tomato strain DC3000 (PstDC3000), and the bacterial growth and virulence machinery. The results demonstrated that tomato plants were able to acclimate to mild heat stress, showing no symptoms of damage. Moreover, plants subjected to a 5 °C increase (T31 °C plants) showed higher basal levels of metabolites such as proline and putrescine, which probably act as compatible osmolytes. This demonstrates their importance as key components of thermotolerance. When grown under mild heat stress, plants were less susceptible to PstDC3000 and showed increased accumulation of abscisic acid, jasmonic acid-isoleucine, and spermine. In addition, the temperature increase negatively affected the infectivity of PstDC3000. Inhibition of the genes responsible for quorum sensing establishment and synthesis of flagellin and coronatine was observed in bacteria extracted from T31 °C plants. Analysis of the genes involved in the synthesis of the type III secretion system indicates the important role of this system in bacterial growth under these conditions. As the known resistance mechanisms involved in the defense against PstDC3000 were not activated, the changes in its virulence mechanisms under high temperatures may explain the lower infection observed in the T31 °C plants.

Acta Horticulturae  International Society for Horticultural Science

Acta Horticulturae International Society for Horticultural Science

Horticulturae, Free Full-Text

Horticulturae, Free Full-Text

Horticulturae, Free Full-Text, nelson games sbo

Horticulturae, Free Full-Text, nelson games sbo

Scion 550 R Font Free - Colaboratory

Scion 550 R Font Free - Colaboratory

Applications of deep-learning approaches in horticultural research: a  review

Applications of deep-learning approaches in horticultural research: a review

International Society for Horticultural Science - ppt download

International Society for Horticultural Science - ppt download

PDF) Micropropagation of Aristolochia fimbriata Cham

PDF) Micropropagation of Aristolochia fimbriata Cham

Abstract of Presentation at ISHS Acta Horticulturae 712: IV International  Conference on Managing Quality in Chains – The Integrated View on Fruits  and Vegetables Quality

Abstract of Presentation at ISHS Acta Horticulturae 712: IV International Conference on Managing Quality in Chains – The Integrated View on Fruits and Vegetables Quality

Environmental horticulture for domestic and community gardens—An integrated  and applied research approach - Gush - PLANTS, PEOPLE, PLANET - Wiley  Online Library

Environmental horticulture for domestic and community gardens—An integrated and applied research approach - Gush - PLANTS, PEOPLE, PLANET - Wiley Online Library