|Table of Contents|

Effects of Exogenous Melatonin on Seed Germination of  Perilla frutescens Under Drought Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2018年05
Page:
140-144
Research Field:
Publishing date:

Info

Title:
Effects of Exogenous Melatonin on Seed Germination of  Perilla frutescens Under Drought Stress
Author(s):
LI Ai; LI Lin; SUN Wangliang; SUN Feng
(College of Horticulture Landscape，Tianjin Agricultural University，Tianjin 300384)
Keywords:
Perilla frutescens; seed germination; melatonin; drought stress
PACS:
-
DOI:
10.11937/bfyy.20172549
Abstract:
In the present study，polyethylene glycol(PEG-6000) was used to simulate the environment of drought stress.The effects of different concentrations of melatonin on seed germination(germination rate，germination potential，germination index，vigor index) and seedlings growth(length of root，length and width of cotyledon，fresh weight of cotyledon) of Perilla frutescens were studied.The results showed that germination of P.frutescens seeds was significantly inhibited under drought stress.However，after treatment at different concentrations of melatonin，every germination index was significantly improved.And every index reached to maximum in T1 treatment(10% polyethylene glycol+50 μmol?L-1 melatonin).The germination rate was 64.00%，the germination potential was 43.67%，the germination index and vigor index were 17.62 and 0.065，respectively.Melatonin treatment also improved the growth of P.frutescens seedlings under drought stress.The effect was most obvious in T3 treatment(10% polyethylene glycol+300 μmol?L-1 melatonin)，and the length of root was 7.45 mm，the fresh weight of cotyledons was 3.53 mg and the length-width ratio of cotyledons was 1.260.All the results showed that application of exogenous melatonin could effectively promote seed germination under drought stress and provided reference for the breeding and cultivation of P.frutescens.

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Last Update: 2018-03-15