Mechanism of Exogenous Application of Oxidized Glutathione

Oxidized glutathione (GSSG) is a key small-molecule thiol compound in organisms.

Together with reduced glutathione, it maintains the redox homeostasis of the body and participates in the regulation of multiple physiological processes such as photosynthesis, growth and development, and stress resistance in plants.

Exogenous application of GSSG can significantly promote crop growth and improve yield and quality, which has been fully verified in crops such as potatoes.

Its yield-increasing mechanism is mainly reflected in three aspects:

optimization of photosynthetic performance, regulation of dry matter accumulation, and stress resistance guarantee.

Improvement of Crop Photosynthetic Efficiency

GSSG can markedly enhance crop photosynthetic efficiency, providing a material basis for yield formation.

It increases the leaf area index and leaf SPAD value, expands the photosynthetic area, strengthens chlorophyll stability, and improves the efficiency of light energy capture and carbon assimilation, thereby supplying sufficient driving force for carbohydrate synthesis.

In potato experiments, treatment with an appropriate concentration of GSSG resulted in significantly better leaf photosynthetic indicators than the control group, laying a physiological foundation for subsequent yield improvement.

Optimization of Dry Matter Accumulation and Distribution

GSSG optimizes dry matter accumulation and distribution to promote the development of economic organs.

Exogenous foliar spraying of GSSG can direct more photosynthates to transport to storage organs such as tubers and fruits, raise the accumulation and distribution ratio of dry matter, and further increase the fruit setting number per plant, commodity rate and proportion of large potatoes.

Meanwhile, GSSG can also improve crop quality, for instance, increasing the starch content and reducing the reducing sugar content in potato tubers, so as to realize the coordinated improvement of yield and quality.

Enhancement of Plant Stress Resistance

GSSG ensures stable and high crop yields by strengthening plant stress resistance.

As a vital antioxidant regulator, it maintains the metabolic balance of reactive oxygen species in vivo, alleviates damage caused by adverse stress, and boosts crops' environmental adaptability.

Experiments on multiple potato varieties in different ecological regions have proven that GSSG exerts a stable yield-increasing effect, confirming its role in stress resistance guarantee.

Rational application is the key to the efficacy of GSSG.

Foliar spraying of GSSG during the tuber formation stage achieves the optimal effect for potatoes.

By strengthening photosynthesis, optimizing material distribution and enhancing stress resistance, GSSG effectively improves crop yield and quality, possessing important application value in modern agricultural production.

References

[1] Chen Y Y, Kang W Q, Tian B T, et al. Effects of Foliar Spraying Oxidized Glutathione on Dry Matter Accumulation and Yield of Potato[J]. Journal of Northern Agriculture, 2020, 48(4): 54-59.
[2] Mouri T, Kamikita T, Taoka N, et al. Effects of Oxidized Glutathione on Potato Yield[R]. Okayama: Okayama Institute of Biological Science, 2017.

*Special note - This article is for informational purposes only and cannot replace a doctor's treatment diagnosis and advice. It should not be regarded as a recommendation or proof of efficacy of the medical products involved. If it involves disease diagnosis, treatment, and rehabilitation, please be sure to go to a professional medical institution to seek professional advice.

by GSHWORLD

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