Factors of influencing adventitious root formation of cotyledon segments in mango.
Li YunHe, Ma Jie, Wu YongJie, Sun GuangMing
Author Affiliation: South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, Guangdong 524091, China.
Acta Botanica Boreali-Occidentalia Sinica 31 : 842-847
Abstract : In order to research the factors of influencing adventitious rooting from cut surface of mango cotyledon segments, the segments' rooting abilities of different collect time, different lengths, different cut positions and different varieties were examined. The results showed that rooting ability of cotyledon segments increased with the increase of maturity of fruits, there was no root formation at the 2 cm cotyledon segments from the embryos of 50 and 60 days after flowering. At 70 days after flowering, there was adventitious root formed on PCS (proximal cut surface), the percentage rooting was 28.6%; After that, the rooting ability was increased sharply and reached to 76.7% at 90 days after flowering, but then kept at a steady level until matured at 110 days after flowering. The length (2.0, 1.0, 0.5 and 0.2 cm) of cotyledon segment from maturated fruits was closely related with the rooting ability: there was no root formed on 0.2 cm segment, whereas roots formed on the other three length segments and the rooting ability increased with the increase of lengths. Compared the rooting abilities of Mangifera indica L. var. Zihua, M. indica L. var. Okrong and Mangifera indica L. var. Zill, all of them were almost same. Cut position of cotyledon segment (i. e., close to the proximal or not) has little effect on the rooting.