Freezing Stress Affects Herbicide Efficacy On Sterile Oat and Turnipweed in Wheat

Hasanfard, Alireza; Rastgoo, Mehdi; Izadi-Darbandi, Ebrahim; Nezami, A; Chauhan, Bhagirath Singh

doi:10.1007/s10343-023-00842-3

Cited by 1 publication

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Content of photosynthetic pigments (CPPs) (Dere et al, 1998), anthocyanins (Wagner, 1979), free radical scavenging activity by DPPH (Brand-Williams et al, 1995), flavonoids (Chun et al, 2003), total phenol content (Singleton and Rossi, 1965) and enzymatic antioxidants activity, including ascorbate peroxidase (APX), catalase (CAT), and peroxidase (POD) (Lee and Lee, 2000) were measured by spectrophotometer (Jenway UV-Visible Spectrophotometer Model 6305, UK). Chlorophyll fluorescence parameters (before stress and at 24, 72, and 120 hours after stress) were measured under stable environmental conditions from the youngest fully developed leaf using a pulse-modulated fluorometer (model OS1-FL, Opti-Sciences, Hudson, NH, USA) (Hasanfard et al, 2023a). All measurements were taken on one leaf per plant using sun-exposed leaves under similar environmental conditions between 11:00 and 14:00 on sunny days (Leakey et al, 2006;Li et al, 2019).…”

Section: El( % ) = (Ec1=ec2) â 100mentioning

confidence: 99%

“…Climate change has increased extreme temperature events, restricting the production and development of many plant species. Freezing stress is one of the crucial constraints limiting plant growth and development worldwide (Hasanfard et al, 2022). The growth response of plants in exposure to freezing stress is affected by physiological, biochemical, and morphological processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prolonged exposure to freezing stress reduces the ability of chickpea seedlings to effectively tolerate extremely low temperatures

Nabati,

Nezami,

Hasanfard

et al. 2023

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

The duration and intensity of freezing stress are the most critical factors determining injury in autumn chickpeas, limiting their production and development. To evaluate the effects of freezing temperature and duration on the survival rate (SU%), as well as the physiological and biochemical characteristics of autumn chickpea seedlings, a study was conducted using five different temperatures (0, -6, -8, -10, and -12°C) and five different durations (1 h, 2 h, 3 h, 4 h, and 5 h) of exposure to freezing stress. The SU% of chickpea seedlings decreased to zero after exposure to temperatures of -10°C and -12°C for 5 hours. As the temperature decreased from -8°C to -12°C and the duration of exposure to freezing stress increased from 1 to 5 hours, the leaf membrane stability index decreased by 33%, 48%, 46%, 57%, and 58%, respectively. The highest and lowest total pigment contents were observed after 1 hour at 0°C and 5 hours at -12°C, respectively. The maximum photochemical efficiency of photosystem II (Fv’/Fm’) was not affected by temperatures as low as -8°C in any of the time treatments during the recovery period. However, this parameter’s value decreased as the freezing stress duration increased. At -12°C, the activity of ascorbate peroxidase, catalase, and peroxidase increased by 44.6%, 38.3%, and 33.0%, respectively, as the duration of stress was increased from 1 hour to 5 hours. A positive and significant correlation was observed between plant dry weight, membrane stability index, photosynthetic pigment content, and Fv’/Fm’ with SU% after exposure to freezing stress. The minimum temperature and the maximum duration of freezing stress tolerance in chickpea seedlings were observed at -12°C for two hours. Our findings confirm that prolonging the freezing duration disrupts the defense mechanisms of chickpea seedlings. Therefore, future studies on breeding chickpeas tolerant to freezing stress should concentrate on attributes strongly correlated with SU%.

show abstract