芭菲爾鞋蘭屬 Paphiopedilum callosum、P. delenatii及 P. esquirolei 切花採收
後於自然瓶插下,初萎期之症狀為萼片、翼瓣或唇瓣呈現部分軟垂、輕度褐化、變薄及透明化,漸失觀賞價值;萎凋期之症狀為花朵失水且翼瓣呈現嚴重褐化、皺縮並失去瓶插壽命及觀賞價值。P. delenatii 及P. callosum 之花朵瓶插壽命約 79 天,顯著低於P. esquirolei 之 13 天。吸水量以P. esquirolei 最高,其次為 P. callosum,而P. delenatii 最低;吸水速率之下降以 P. callosum 最快,P. esquirolei 較慢;鮮重變化率以P. esquirolei較低。瓶插期間花色劣變以 P. callosum 最早出現,P. esquirolei 較晚產生劣變。3 個供試材料之切花吸水量皆於瓶插第 1 天為最高,花朵外觀呈現飽滿且富有光澤。萼片、翼瓣或唇瓣之細胞皆排列緊密且呈現膨潤之狀態,而後隨著吸水量之下降,其萼片、翼瓣及唇瓣表皮細胞會呈現失水及萎凋的狀態越趨明顯,細胞向中央塌陷,周緣形成褶紋。
The purpose of this research was to study the postharvest physiology and ultrastructure of three
Paphiopedilum of cut flowers, P. callosum,, P. delenatii and P. esquirolei. In the slightwilting stage, the sepal,
petal and lip were partly weak, thin and transparent. In the wilting stage, water loss occurred, flowers
browned, then vase life ended. The vase life of P. delenatii and P. callosum was 89 days, which was
significantly shorter than the 13day vase life of P. esquirolei under room temperature. P. esquirolei had the
highest volume of water uptake, followed by P. callosum, and then P. delenatii. The daily water loss ratio was
the highest in P. callosum, and the lowest in P. esquirolei. The water uptake of cut flowers of all three species
was highest in the first day; the flowers appeared full and glossy. In addition, the epidermal cells of sepal,petal and lip were arrayed in a compact and swelling appearance. As the water uptake reduced gradually, the
water loss of flowers resulted in dehydration and wilting of the epidermis of sepal, petal and lip. Whereas the
visible wilt symptom appeared due to the sunken cells of above parts. The sepal, petal and lip of P. callosum ,
P. delenatii and P. esquirolei sunk inward, thus resulting in crimple on the margin. In conclusion of this study,
P. esquirolei has the highest water uptake, the longest vase life, and the latest appearance of aging symptoms.