6-Benzylaminopurine and Gibberellic Acid Mitigate the Yellowing of Pak Choi (Brassica rapa Subsp. Chinensis) During Storage by Regulating Sugar Scarcity-Induced Chlorophagy

• DOI: 10.1021/acs.jafc.4c11182
• Publication Date: 2025-03-20T23:55:30Z
• Authors: Liuli Song; Wenhui Hu; Changbao Wang; Shibao Bao; Hao Yan; Haibo Luo
• Keywords: Brassica rapa; Gibberellic acid

This study investigated the effects of 6-benzylaminopurine (6-BA) and gibberellic acid (GA) on yellowing pak choi associated with sugar protein metabolism during storage at 20 °C. 6-BA, GA, 6-BA+GA prevented leaf yellowing, decline in chlorophyll content, changes color parameters. All treatments activated sucrose phosphate synthase synthase-synthesis addition to inhibiting decrease amylase, glucokinase, UDP-glucose pyrophosphorylase activities. These also maintain high levels sugars storage. Besides, three increased transcript synthesis genes suppressed expression catabolism, amylolysis, degradation, autophagy, transport, sensing signaling. Sugar scarcity may activate BcATGs expression, which triggers Rubisco degradation chlorophagy, ultimately leading breakdown, whereas 6-BA GA slow breakdown thus its adverse effects. Our findings demonstrate ability 6-BA/GA delay induced by autophagy prevent vegetables.