|Table of Contents|

Study on Seeds Germination Characteristics of Rhododendron dauricum L.

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年17
Page:
77-83
Research Field:
Publishing date:

Info

Title:
Study on Seeds Germination Characteristics of Rhododendron dauricum L.
Author(s):
GU Xiaolin; QI Ruiyan; SUN Yan
(College of Agricultural Resources and Environment,Heilongjiang University,Harbin,Heilongjiang 150080)
Keywords:
Rhododendron dauricum; germination characteristics; GA3; NaCl stress
PACS:
-
DOI:
10.11937/bfyy.20190280
Abstract:
Rhododendron dauricum seeds were used as experimental materials,the seeds morphology was observed for conventional observation method and paraffin section method,and different treatments were set by conditions such as light,temperature,GA3 concentration and NaCl stress.The seeds morphology and germination characteristics were studied,which were intended to provide theoretical basis for seed reproduction and resource protection of Rh.dauricum.The results showed that the seeds of Rh.dauricum were small and the 1 000-seed weight was only 0.100 4 g from maturity to mature embryo.The seeds of Rh.dauricum could not germinate in the dark.The optimum temperature for seed germination was 25 ℃,higher or lower temperature than the optimum can reduce the germination rate.A suitable concentration of GA3 could promote the germination.Under NaCl stress,the germination rate,the germination potential and germination index decreased significantly with the increase of NaCl concentration.When NaCl concentration exceeded 0.6%,the seeds could not germinate at all.To sum up,the seeds of Rh.dauricum needed light to germinate,and the optimum germination temperature was 25 ℃.In addition,the germination were sensitive to the salt stress,and can be promoted by GA3 at 600 mg?L-1,resulting in 92.67% germination rate.

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Last Update: 2019-09-24