Germination responses of a Saharan species Henophyton deserti Coss. & Durieu to temperature and water stress
Language
en
Article de revue
This item was published in
Seed Science and Technology. 2010, vol. 38, n° 3, p. 646-654
International Seed Testing Association Ista
English Abstract
Henophyton deserti Coss. & Durieu, is an endemic Saharan plant of the Brassicaceae family. Experiments were conducted to assess the effects of temperature and water stress on seed germination. The germination responses of ...Read more >
Henophyton deserti Coss. & Durieu, is an endemic Saharan plant of the Brassicaceae family. Experiments were conducted to assess the effects of temperature and water stress on seed germination. The germination responses of the seeds of H. deserti in complete darkness were determined over a wide range of temperatures (10°C, 15°C, 20°C, 25°C, 30°C, 35°C) and different water potentials (−0.2, −0.6, −0.8, −1.0, −1.2, −1.4, −1.6, −2.0 MPa) induced by polyethylene glycol (PEG-6000) in order to verify their resistance to drought conditions. Germination was inhibited by either an increase or decrease in temperature from the optimal temperature (20°C) and decreased with a decrease in water potential at all temperatures. An interaction between water potential and temperature yielded no germination at −2 MPa. An understanding of these factors is crucial for successful regeneration and recruitment of these long lived Saharan plant species.Read less <
Keywords
GERMINATION DE LA GRAINE
English Keywords
HENOPHYTON DESERTI
Origin
Hal imported