黎秀瓊+黃偉+許澤康+王亞沉+張尉+吳金山
摘 要 南非葉是熱帶地區(qū)一種重要的中草藥材,主要以扦插繁殖為主,為拓寬繁殖途徑,實驗以南非葉外植體葉為材料,以不同激素濃度配比誘導其愈傷組織,篩選最佳誘導濃度組合。結果表明:(1) NAA和6-BA各5個濃度梯度組合中,1.5 mg/L NAA+1.5 mg/L 6-BA+0.5 g/L活性碳愈傷組織誘導率最高,為88.3%。即當6-BA為定量時,隨著NAA濃度的增加,誘導率也逐漸提高;當NAA濃度為1.5 mg/L時,誘導率達到最佳效果,如繼續(xù)增加NAA的濃度反而會下降。如單獨使用6-BA時,則外植體不分化。(2) 在NAA和2,4-D組合中,1.5 mg/L NAA+2.0 mg/L 2,4-D+0.5 g/L活性碳愈傷組織誘導率最高,達95%。當2,4-D濃度大于0.5 mg/L,單獨使用時,外植體也可誘導分化,增殖效果隨著2,4-D濃度的增加而增加。
關鍵詞 南非葉 ;外植體葉 ;不同激素 ;愈傷組織 ;誘導率
中圖分類號 S615 文獻標識碼 A Doi:10.12008/j.issn.1009-2196.2017.09.004
Effects of Different Hormone Combinations on Callus Induction
of Leaf Explant from Vernonia amygdelina
LI Xiuqiong1) HUANG Wei2) XU Zekang1)
WANG Yachen1) ZHANG Wei1) WU Jinshan1)
(1 Institute of Tropical agriculture and forestry, Hainan university, Hainan danzhou 571737
2 The archives , Hainan university, Hainan haikou 570228)
Abstract Bitter leaf (Vernomia amygdelina) is an important Chinese medicinal plant in the tropical areas, and is propagated mainly by cutting. In order to find more ways for propagation, the leaf explant of the bitter leaf was induced into calli with different hormones at different concentrations to screen optimum hormone combinations. The results showed that the callus inducing rate was 88.3%, the highest in the 5 hormone combinations of NAA and 6-BA when the explant was treated with the hormone combination of 1.5 mg/L NAA + 1.5 mg/L 6-BA + 0.5 g/L. When the 6-BA concentration was not changed, the callus inducing rate increased with the concentration of NAA. The callus inducing rate was the highest when the concentration of NAA was 1.5 mg/L, but decreased when the NAA concentration increased. The leaf explant did not differentiate when only treated with 6-BA. In the hormone combinations of NAA and 2,4-D the combination of 1.5 mg/L NAA + 2.0 mg/L 2,4-D + 0.5 g/L gave the highest callus inducing rate (95%). When the 2,4-D concentration was greater than 0.5 mg/L, the 2,4-D alone could induce the explant into differentiation, and the proliferation effect increased with the 2,4-D concentration.
Keywords Vernomia amygdelina ; leaf explant ; hormone ; callus ; inducing rate
南非葉(Vernoniaamygdalina Del)在我國東南沿海地區(qū)又稱“將軍葉”,為菊科斑鳩菊屬多年生草本植物,主要分布在熱帶非洲的南非地區(qū),是當?shù)刂匾闹胁菟幉?,深受人們歡迎。在尼日利亞,南非葉被當作一種蔬菜食用。南非葉植株為直立小灌木,網(wǎng)狀葉脈,葉互生,植株可達2~3 m,葉背面或主脈處生有白色絨毛,頭狀花序,花白色或淡粉白色。其適應性強,在我國南方沿海熱帶地區(qū)四季均可種植,又俗稱“苦茶”。我國種植的南非葉主要從馬來西亞、新加坡等地引種而來。南非葉是一種重要的中藥材,味苦澀,性涼,具有清熱解毒、除濕殺蟲、散熱、涼血和清血等多種功效;適用于降血壓、降膽固醇,以及糖尿病、風熱性或血熱性皮膚病及皮膚搔癢的治療;同時對閃光、老花眼、近視及青光眼也有顯著的治療效果。endprint