Ecophysiology of Ocimum basilicum with thermopriming and its effect on Peronospora belbahrii

Authors

  • Mirella Romero-Bastidas UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIA SUR
  • Bernardo Murillo-Amador Centro de Investigaciones Biológicas del Noroeste (CIBNOR)
  • Luis Guillermo Hernández-Montiel Centro de Investigaciones Biológicas del Noroeste (CIBNOR)
  • Enrique Troyo-Dieguez Centro de Investigaciones Biológicas del Noroeste
  • Alejandra Nieto-Garibay Centro de Investigaciones Biológicas del Noroeste

DOI:

https://doi.org/10.19136/era.a9n3.3491

Keywords:

Control, growth, mildew, temperature y vigor

Abstract

Downy mildew (Peronospora belbahrii) affects severely the development of Ocimum basilicum; its control is complicated due to the restricted
use of fungicides. The objective of this study was to subject basil var. Nufar seeds to thermopriming treatments at 40, 50 and 60°C in different exposure time intervals (30, 60 and 90 min) to assess the existing relationship between
disease symptom emergence and relative humidity, environmental temperature and seed pre conditioning treatment effects on plant disease severity, incidence
and physiological response. The seeds weresowed in mesh house pots and when plants reached 15 cm, they were infected with P. belbahrii. Disease incidence was determined weekly; at 60 days after sowing, morphometric and physiological variables were determined showing significant differences between temperature, exposure time and interaction in the majority of the variables assessed. A decrease
in disease incidence was observed in plants from seed thermopriming treated at 60°C for 60 min of exposure. This same treatment was found to show less stomatal opening and transpiration and greater substomatal concentration of CO2, which suggested a probable relationship P. belbahrii entering the leaf decreasing its incidence.

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Author Biography

  • Mirella Romero-Bastidas, UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIA SUR

    Deparatamento Académico de Agronomía, Profesor-Investigador

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Published

2022-12-31

Issue

Section

SCIENTIFIC ARTICLE

How to Cite

Ecophysiology of Ocimum basilicum with thermopriming and its effect on Peronospora belbahrii. (2022). Ecosistemas Y Recursos Agropecuarios, 9(3). https://doi.org/10.19136/era.a9n3.3491

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