Abstract：To observe the effects of 1-Naphthylacetic acid （NAA） and Ethephon （Eth） on germination and growth of litchi （Litch chinensis Sonn. ） pollen, NAA and Eth were added at a certain concentration respectively in basic medium, two varieties different batches of pollen to Nuomici and Guiwei were cul- tured and the pollen germination rate and pollen tube length were determined. The results showed that NAA promoted different batches of pollen germ/nation and pollen tube growth of Nuomici and Guiwei, but the suitable concentration of pollen germination and pollen tube growth in different batches of two varieties of litehi was different. The suitable mass concentration of NAA for second batches of pollen germination was 1.0 - 3.0 mg/L, and that for pollen tube growth was 0.5 - 3.0 mg/L. Low concentration of Eth pro- moted pollen germination and pollen tube growth in different batches of two Litchi euhivars. The appro- priate concentrations of Eth to promote second batch of pollen germination of Nuomici and Guiwei were 1.0-5.0 and 10.0 mg/L, respectively, the suitable concentration of second batch of promoting pollen tube growth of Nuomici and Guiwei was 1.0 mg/L. High concentration （20. 0 mg/L） Eth inhibited the germination and tube growth of different batches of pollen in two Litchi cultivars. The results suggested that NAA and Eth could promote the germination and pollen tube growth of litchi pollen, and the suitable concentration for pollen germination and growth between different batches of pollen was different.
2017, Vol. 30 
