Screening of Sunflower (Helianthus annuus L) Genotypes for Moisture Stress Tolerance using PEG-6000

Induction on Seed Germination and Seeedling Performances against Sunflower (Helainthus annuus L.) and Castor bean (Ricinus communis L.) as influenced by Different Water Stress Treatments

“…Fatemi et al (2014) who presented that the impaction of water stress treatments on germination percentage and germination rate against sunflower. Besides,Sheshaiah et al (2017) revealed that the water stress treatment (water stress induced by polyethelene glycol (PEG 6000) for 20 and 25% concentrations) inhibited the seed germination and germination time index against sunflower, which more injured than the control treatment (no water stress treatment)The loss of seed germination and speed of germination resulted from water stress treatment, Pandey and Shukla (2015) noted that the water stress condition acts the reduction of cell elongation and inhibition of cell expansion as well as water stress lead to poor root development and reduction of leaf growth.The reduction of seed quality of sunflower resulted in the increase of inhibition of seed germination and speed of germination. The high seed quality showed the minimum of inhibition of seed germination and speed of germination ranged from 12.74% to 53.94% and 15.96 % to 58.75% inhibition, respectively followed by the medium of seed quality exhibited the inhibition of seed germination and speed of germination for 21.04-60.84% inhibition and 24.68-68.79% inhibition as well as the low of seed quality of sunflower noted the maximum of inhibition of seed germination and speed of germination ranged from 32.76% to 71.82% and 35.79% to 76.94% inhibition, respectively (Table 2).The data from the research showed that the increase of inhibition of seed germination and speed of germination resulted in the decrease of the seed quality of sunflower, as a results that inconformity with the finding works of Elsheikh et al (2015) as well asBuriro et al (2015) who showed the induction of the water stress on seed germination seedling growth and yield of sunflower.…”