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Research ArticleRefereed Research

Thermotolerance in seeds of a new oilseed crop Physaria fendleri (A. Gray) O’Kane & Al-Shehbaz and related species

Von Mark V Cruz, Jenna Marie Schnibbe and David A Dierig
Native Plants Journal, March 2021, 22 (1) 66-75; DOI: https://doi.org/10.3368/npj.22.1.66
Von Mark V Cruz
(Plant Breeding and Genetics) Bridgestone Americas Inc Agro-Operations Guayule Research Farm Eloy, AZ 85131-9532
Roles: Research Scientist
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  • For correspondence: [email protected]
Jenna Marie Schnibbe
Formerly at Colorado State University College of Agricultural Sciences Fort Collins, CO 80523-5204
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David A Dierig
Bridgestone Americas Inc Agro-Operations Guayule Research Farm Eloy, AZ 85131-9532
Roles: Department Manager
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  • For correspondence: [email protected]
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Abstract

Tolerance to high temperature is a valuable trait in plants along with resilience to other abiotic stresses. We conducted 2 experiments to test the effect of varying high temperature treatments on the seed germination of Physaria fendleri (A. Gray) O'Kane & Al-Shehbaz (syn. Lesquerella fendleri [Brassicaceae]) and its relatives, P. argyraea (A. Gray) O'Kane & Al-Shehbaz, P. gordonii (A. Gray) O'Kane & Al-Shehbaz, and Paysonia grandiflora (Hook.) O'Kane & Al-Shehbaz (Brassicaceae). In one experiment, we examined the germination response of these species at 60 °C (140 °F), 80 °C (176 °F), and 103 °C (217 °F) for various lengths of time (0.5, 1,4, 12, 24, and 72 h), and in another experiment we focused on lower temperatures and smaller time increments at 85 °C (185 °F), 90 °C (194 °F), and 95 °C (203 °F) for 10, 20, 40, and 60 min. Results indicated significant differences in the germination percentages among species and temperature regimens. Seeds of P. grandiflora retained viability (3%) after 4 h at 103 °C (217 °F). Seeds of the other species retained high viabilities (67-89%) after exposure to 60 °C (140 °F) and 80 °C (176 °F) up to 72 h. These results demonstrate that these taxa have seeds that exhibit tolerance to extreme temperatures. The information may be useful for understanding the resilience of Paysonia and Physaria in wild habitats. Further investigation on this seed thermotolerance trait may have an impact on future crop improvement and germplasm conservation activities in Lesquerella and related Brassica species.

KEY WORDS
  • arid zone species
  • dormancy
  • thermotolerance
  • new crops
  • bladderpod
  • Brassicaceae
NOMENCLATURE
  • The Plant List (2013)

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Native Plants Journal: 22 (1)
Native Plants Journal
Vol. 22, Issue 1
20 Mar 2021
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Thermotolerance in seeds of a new oilseed crop Physaria fendleri (A. Gray) O’Kane & Al-Shehbaz and related species
Von Mark V Cruz, Jenna Marie Schnibbe, David A Dierig
Native Plants Journal Mar 2021, 22 (1) 66-75; DOI: 10.3368/npj.22.1.66

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Thermotolerance in seeds of a new oilseed crop Physaria fendleri (A. Gray) O’Kane & Al-Shehbaz and related species
Von Mark V Cruz, Jenna Marie Schnibbe, David A Dierig
Native Plants Journal Mar 2021, 22 (1) 66-75; DOI: 10.3368/npj.22.1.66
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Keywords

  • arid zone species
  • dormancy
  • thermotolerance
  • new crops
  • bladderpod
  • Brassicaceae
  • The Plant List (2013)
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