Role of reactive oxygen species and antioxidative enzymes in the loss and re-establishment of desiccation tolerance in germinated pea seeds

Sahu, Balram; Naithani, Subhash Chandra

doi:10.1016/j.sajb.2023.10.029

Cited by 1 publication

(1 citation statement)

References 82 publications

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“…Notably, these two enzymes exhibited contrasting trends in their activity alterations, with POD activity showing a rapid decrease, while CAT activity demonstrated a simultaneous rapid increase. Furthermore, during the desiccation process of S. tzumu seeds, it was found that MDA content was higher when POD and SOD activities were at a high level, which may be because the CAT enzyme plays a decisive role in the acquisition of desiccation tolerance [49]. SOD and POD activities were induced when the seeds were severely damaged.…”

Section: Changes and Interactions Of Physiological Indexes During Deh...mentioning

confidence: 98%

Study on Desiccation Tolerance and Biochemical Changes of Sassafras tzumu (Hemsl.) Hemsl. Seeds

Peng,

Wang,

et al. 2023

Forests

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The deciduous tree species Sassafras tzumu (Hemsl.) Hemsl., unique to China, holds significant economic and ecological value. However, its seeds exhibit poor storage tolerance and rapid decline in seed vigor. This study primarily investigates the desiccation tolerance of S. tzumu seeds. The results show that S. tzumu seeds have recalcitrant seed characteristics, with a semi-inactivation water content (at which point half of the seeds lose viability) of 20.7%. As desiccation progresses, seed viability decreases significantly; at a reduced water content of 11.93%, only 18.3% of the seeds remain viable, while most lose their viability completely. Relative electrolytic leakage (REC) and H2O2 content gradually increase during this process, while MDA content initially decreases before increasing again, exhibiting distinct trends compared to antioxidant enzyme activities such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT). SOD and POD activities exhibit an initial increase followed by a rapid decrease, whereas CAT activity shows a decline followed by a rapid increase. Dehydration to 15% water content in seeds is a key turning point in the process of seed desiccation in S. tzumu, and CAT is an enzyme key to maintaining seed viability. Both the accumulation of toxins and the decline in the activity of the antioxidant system contribute to the susceptibility of S. tzumu seeds to drought stress, a characteristic common to all recalcitrant seeds. To maintain high seed viability above 70% during storage, it is crucial to ensure water content above 23.58%.

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Section: Changes and Interactions Of Physiological Indexes During Deh...mentioning

confidence: 98%

Study on Desiccation Tolerance and Biochemical Changes of Sassafras tzumu (Hemsl.) Hemsl. Seeds

Peng,

Wang,

et al. 2023

Forests

View full text Add to dashboard Cite

show abstract

Role of reactive oxygen species and antioxidative enzymes in the loss and re-establishment of desiccation tolerance in germinated pea seeds

Cited by 1 publication

References 82 publications

Study on Desiccation Tolerance and Biochemical Changes of Sassafras tzumu (Hemsl.) Hemsl. Seeds

Study on Desiccation Tolerance and Biochemical Changes of Sassafras tzumu (Hemsl.) Hemsl. Seeds

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