1 research outputs found
Osmotic stress tolerance in forage oat varieties (Avena Sativa L.) based on osmotic potential trials
Received: April 1st, 2022 ; Accepted: December 12th, 2022 ; Published: February 7th, 2023 ; Correspondence: [email protected]; [email protected] oats (Avena sativa L.) are globally important for milk and meat production,
and, to a lesser extent, for the human diet. In Mexico, oats are a strategic crop, occupying the
fourth place in cultivated area, only after maize for grain, bean, and sorghum for grain. Droughts
are the main problem for oat production in Mexico. This study evaluated the germination and
seedling growth of several oat varieties in response to drought stress simulated by PEG-6000
treatments of different osmotic pressure in order to identify drought-resistant genotypes. The
Teporaca genotype was the most outstanding in the three levels of OP compared to its control
with 0.0 of Osmotic Potential (OP). The Teporaca genotype showed the largest root length and
the lowest diminishment of root length under osmotic stress conditions. This genotype also had
the largest shoot length in the three osmotic stress levels. Regarding root fresh weight, Babicora
stands out with 98.5% and Teporaca with 43% in the most severe level. Teporaca, Menonita, and
Babicora showed the outstanding root dry weights of 346.5%, 327.2%, and 251.2%, respectively.
These varieties had higher root dry weight than their own controls in water in the most severe
level of OP. In conclusion, the Teporaca, Menonita, and Karma genotypes showed the highest
osmotic stress tolerance and could be used as sources of favorable alleles to improve oat drought
tolerance