The color and berry size of ‘Crimson Seedless’ play vital role in their marketability. In the present study, eight-year-old ‘Crimson Seedless’ was used as the experimental material to investigate the effect of plant growth regulators on the fruit weight, quality and color. Several dilutions of “Pro-Gibb” (20% gibberellic acid (A₃)) and “Promalin” (1.8% 6-BA & 1.8% gibberellic acid (A₄ + A₇)) were applied to the ‘Crimson Seedless’ plants during the swelling period, and the results showed that the cluster weight and berry weight were significantly increased by 46.77% and 20.64% respectively when treated with 6000 times diluted solution of “Promalin”. Except for application of 15,000 times diluted solution of “Pro-Gibb”, 4000 times and 5000 times diluted solution of “Promalin”, there were no significant differences between control and other treatments in soluble solid content (SSC). The titratable acid content (TA) of the berries was also significantly reduced under various treatments of plant growth regulators. The Vc content of the berries under T2 treatment increased up to 6.40 mg/100 g compared with the control. The color of berries with 20,000 times diluted solution of “Pro-Gibb” treatment was pink, and the color of berry with other treatments was red. In conclusion, application of 6000 times diluted solution of “Promalin” improved fruit quality, texture and berry weight more effectively compared with other applied treatments. Overall, the results of the present study showed that optimized doses of the plant growth regulators could significantly improve the ‘Crimson Seedless’ fruit quality.

'Crimson Seedless' 的颜色和浆果大小对其适销性起着至关重要的作用。在本研究中，以 8 岁的“Crimson Seedless”为实验材料，研究植物生长调节剂对果实重量、品质和颜色的影响。“Pro-Gibb”（20% 赤霉酸 (A ₃ )）和“Promalin”（1.8% 6-BA 和 1.8% 赤霉酸 (A ₄  + A _{7 )）的几种稀释液}))在'Crimson Seedless'植株膨大期施用，结果表明，经6000倍稀释的“Promalin”溶液处理后，簇重和浆果重分别显着增加了46.77%和20.64%。除施用“Pro-Gibb”15000倍稀释液、“Promalin”4000倍、5000倍稀释液外，对照与其他处理在可溶性固形物含量（SSC）上无显着差异。在植物生长调节剂的各种处理下，浆果的可滴定酸含量（TA）也显着降低。与对照相比，T2 处理下浆果的 Vc 含量增加至 6.40 mg/100 g。“Pro-Gibb”处理20,000倍稀释溶液的浆果颜色为粉红色，其他处理的浆果颜色为红色。总之，与其他施用处理相比，施用“Promalin”6000倍稀释溶液更有效地改善了果实品质、质地和浆果重量。总体而言，本研究的结果表明，植物生长调节剂的优化剂量可以显着提高“深红无核”果实的品质。