论文部分内容阅读
一、切花衰老的生理原因 1.碳源供应不足切花从母体切离后即切断了碳源——糖的供应,会比留在母枝上更快地衰老变质。 2.水份失衡保持一定的膨压是切花最紧要的,而且糖只有在水份平衡时才能发挥作用,但花枝切离母体后茎不能补偿蒸腾失水,从而破坏了水份平衡,加上切口受伤细胞的分泌物和细菌及其代谢物堵塞了木质部导管,最终引起缺水而造成切花衰老。 3.乙烯伤害作用乙烯在切花衰老过程中起关键性的调节作用,通过生理作用阻止衰老器官中糖的分解和再分配。乙烯主要由衰老组
First, the physiological reasons for cut flowers 1. The lack of supply of carbon cut cut from the mother cut off after the carbon source - the supply of sugar, will stay in the mother than faster aging deterioration. 2. Imbalance of water to maintain a certain turgor pressure is the most important cut flowers, but only when the water balance in the water to play a role, but the stem cut off from the mother after the stem can not compensate for transpiration dehydration, thus undermining the water balance, coupled with Cut-wound cell secretions and bacteria and their metabolites plug the xylem catheter, eventually leading to lack of water and cut flowers caused by aging. Ethylene injury ethylene play a key role in the process of cut flower senescence, through the physiological role of preventing the decomposition and redistribution of sugar in aging organs. Ethylene mainly by the aging group