6-Benzyladenine Treatment Maintains Storage Quality of Chinese Flowering Cabbage by Inhibiting Chlorophyll Degradation and Enhancing Antioxidant Capacity

Abstract

The cytokinin 6-benzyladenine (6-BA) is widely used to regulate the growth of horticultural crops. However, it is not clear how postharvest treatment with 6-BA at various concentrations affects the quality of Chinese flowering cabbage. In this study, harvested Chinese flowering cabbage was foliar sprayed with 6-BA solution at concentrations of 5, 10, 20, 40, and 80 mg·L−1. All 6-BA treatments protected the quality of Chinese flowering cabbage during storage, and the treatment with 20 and 40 mg·L−1 6-BA showed the most obvious effect. Treatment with 6-BA reduced leaf yellowing degree and weight loss rate; maintained high chlorophyll a and chlorophyll b contents; suppressed the declines in ascorbic acid and soluble protein; enhanced antioxidant capacity; and reduced oxidative damage in cabbage leaves. Furthermore, 6-BA treatment upregulated the expression of antioxidant genes and the activities of SOD, POD, and CAT, while inhibiting the expression of senescence-related gene (BrSAG12) and chlorophyll catabolic genes (BrPAO, BrPPH, BrSGR1, BrNYC1, BrRCCR). These results suggest that postharvest 6-BA treatment enhances antioxidant capacity, delays leaf senescence, and inhibits chlorophyll degradation, thereby maintaining the quality of Chinese flowering cabbage during storage. The findings of this study provide a candidate method for preserving Chinese flowering cabbage after harvest.

Effect and Mechanism of L-Arginine against Alternaria Fruit Rot in Postharvest Blueberry Fruit

“…The same finding has been shown for blueberries treated with burdock fructooligosaccharides and cherry tomatoes treated with melatonin [ 22 , 23 ]. However, further evidence has also demonstrated that excessive ROS can adversely affect disease resistance [ 24 , 25 , 26 ]. Fruits and vegetables have a self-regulatory protection mechanism that activates the antioxidant defense system, thereby inhibiting excessive ROS accumulation and reducing oxidative damage [ 27 , 28 ].…”

Standardization of packaging material, storage durations and chemical treatments on vase life of soft shield fern Polystichum squarrosum (D. Don)

“…An additional mechanism employed by antitranspirants involves the inhibition of stomata opening, consequently reducing the water loss from the leaf (Sow and Ranjan, 2021). Growth regulators are recommended to prolong postharvest longevity, benzyl adenine (BA) is one of the growth regulators that delays leaf yellowing and consequently increases leaf longevity (Zhang et al, 2023). Spraying of 6-benzylaminopurine (BAP) at concentrations of 37.5-300 mg L -1 improved postharvest durability of Anthurium andreanum 'Apalai' flower without inducing spathe blueing (Favero et al, 2020).…”

Flowering induction in cassava using photoperiod extension premature pruning and plant growth regulators

“…This sexual modification of flowers suggests that genes responsible for sexual differentiation undergo suppression or activation through a signal transduction mechanism that modifies endogenous hormone levels, as observed in Jatropha curcas [ 29 , 30 ]. Studies have shown that 6-benzyladenine can also inhibit lipid peroxidation, preserve membrane integrity in plant tissues [ 31 ] increase antioxidant capacity, and delay leaf senescence in Brassica campestris species [ 32 ].…”