非洲菊鲜切花弯颈部位及有关原因

 研究了非洲菊鲜切花瓶插过程中弯颈易发部位(中部茎段) 及其上部、下部茎段水分平衡动态和某些生理指标的变化。结果表明, 非洲菊鲜切花瓶插过程中: ①鲜样质量和含水量先增后减, 吸水逐渐减少, 蒸腾失水相对稳定, 水分饱和亏缺增大; ②可溶性蛋白质含量呈下降趋势, 但上部茎段一直高于中部和下部茎段; ③MDA 的含量呈上升趋势, 上部茎段低于中部和下部茎段; ④中部茎段的粗纤维含量与上部茎段无显著差异, 但大大低于下部茎段; ⑤瓶插初期POD 活性略有下降, 后期迅速上升, 上部茎段POD 活性一直高于中部茎段和下部茎段。讨论了中部茎段易发生弯曲的原因。

Neck-bending Phenomena in Cut Gerbera Flower

Water balance and some physiological indexe changes during vase life in cut gerbera flowers, especially in the easy bending sections of the scape,were investigated.The results showed that fresh mass and water content of cut gerbera flowers increased firstly but decreased afterwards;water absorption dropped consistently; moisture loss caused by transpiration maintained at a stable level while water saturation deficit rose;soluble protein content tended to decrease with the upper sections having a higher content than that in the middle and lower scape sections;MDA content increased constantly;MDA content in the upper scape sections was lower when compared with that in the middle and lower sections;no significant differences were detected in coarse fiber content between the middle and upper sections with the lower sections having a much higher content of coarse fiber;POD activity varied slightly at earlier period but increased dramatically during the later period of vase life;POD activity in the upper sections was higher than that in the middle and lower sections.The causes of easy to bend neck in the middle section of the scape were discussed.