Studies of post harvest treatment ameliorating bent neck in Roses

切花玫瑰花通常经历快速衰老，通常表现出弯曲的颈部，这会引起顾客的不满，并往往抑制商业消费。切花玫瑰的瓶插寿命通常很短，因为颈部弯曲，花下方的茎弯曲，并且被认为是由于切端存在细菌阻止水分吸收造成的。（RNA降解产物和硝酸银组成）、三羟甲基氨基甲烷和柠檬酸，发现提供了良好的水平衡来切割玫瑰防止弯颈。结果表明，RNA-Ag具有抑菌和预防颈曲的作用。MEI-UP治疗10 cm后仍能保持治疗效果，但20 cm后MEI-UP治疗无效。这是因为RNA-Ag在系统中的流动性有限，对茎切端和下部的细菌有抑制作用。

Cut rose flowers commonly undergo rapid senescence, typically exhibiting bent neck, which creates customer's dissatisfaction and tends to curb commercial consumption. The vase life of cut roses is often very short because of bent neck, the bending of the stem just below the flower, and is thought to be caused by the existence of bacteria at cut end blocking water uptake.A post harvest preservative 'MEI-UP', consisting of RNA-Ag (RNA digradation products and silver nitrate in composition), trishydroxymethylaminomethane and citric acid, was found to provide a good water balance to cut rose preventing bent neck. It was found that the RNA-Ag inhibited bacteria and prevented bent neck. Efficacy of MEI-UP on bent neck was maintained after 10 centimeter recut of the stem MEI-UP treatment, although 20 centimeter recut abolished its effect. It is because that RNA-Ag had limited mobility in the syem and inhibited bacteria at the cut end and lower part of the stem.