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Root Growth Response of Hibiscus moscheutos Seedling to Salt Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年16
Page:
76-81
Research Field:
Publishing date:

Info

Title:
Root Growth Response of Hibiscus moscheutos Seedling to Salt Stress
Author(s):
SUN Huanrong1; FENG Xiaohui2; ZHANG Xiumei2; LIU Xiaojing2; ZAN Fengtong3
(1.Forestry Bureau of Nanpi County，Nanpi,Hebei 061500；2.Center for Agricultural Resources Research，Institute of Genetics and Developmental Biology，Chinese Academy of Sciences，Shijiazhuang,Hebei 050022；3.Agricultural Bureau of Nanpi County，Nanpi,Hebei 061500)
Keywords:
Hibiscus moscheutos; salt stress; biomass; growth; root morphlogy
PACS:
-
DOI:
10.11937/bfyy.201516019
Abstract:
Taking Hibiscus moscheutos seedlings which were planted in the pots as material，different concentrated saline water was irrigated into the soil to control the soil salinity.Eight different soil salinities (0，2，4，6，8，10，12，14 g/kg) were designed for processing.The seedling growth and roots in different soil salinity were studied.The result showed that soil salt stress significantly inhibited the total biomass accumulation of the Hibiscus moscheutos’ aboveground part (stem and leaf) and root (coarse roots,fine root);salt stress also inhibited the plant’s height and its basal diameter growth,the higher the soil salt content was,the earlier the height and basal diameter growth stopped.Under salt stress，the root to shoot ratio of H.moscheutos increased,and salt sensitive index and resistance index significantly decreased with the increasing of soil salt content.In salt stress, compared with the control，the root length and root surface area increased，total root volume in the low salinity(0-6 g/kg) significantly increased，but in high salinity(8-14 g/kg) significantly decreased，but there were no significant difference compared with control.The study indicated that in adverse environment the Hibiscus mascheutos could increase the root surface area and root length by increasing root biomass to adapt to the salt stress environment,but little change happened in the root average diameter.

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Last Update: 2015-09-02