|Table of Contents|

Accumulation and Allocation Characteristics of Biomass and Salt Ion of Corylus heterophylla × Corylus avellana Seedlings Under NaCl Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年19
Page:
22-28
Research Field:
Publishing date:

Info

Title:
Accumulation and Allocation Characteristics of Biomass and Salt Ion of Corylus heterophylla × Corylus avellana Seedlings Under NaCl Stress
Author(s):
LUO Da; SONG Fenghui; SHI Yanjiang
(Institute of Economic Forests，Xinjiang Academy of Forestry Science，Urumqi，Xinjiang 830063)
Keywords:
NaCl stress; Na+; net accumulation;  llocation;  Corylus heterophylla× Corylus avellana
PACS:
S 664.4
DOI:
10.11937/bfyy.20225220
Abstract:
Two-year-old seedlings of Corylus heterophylla × Corylus avellana were selected as test materials.The seedlings were treated with different NaCl concentrations (0，50，100，200 mmol·L-1) in a pot salt experiment.Subsequently，the effects of NaCl stress on the accumulation and allocation characteristics of biomass and salt ion in different tissues were studied，in order to definite the response and adaptive mechanism of C.heterophylla × C.avellana to salt stress.The results showed that after NaCl stress，the biomass accumulation of roots，stems，leaves，shoots and the whole plant all decreased significantly，while the root-shoot ratio increased significantly.Under different NaCl stress，plant biomass was allocated to the root most (75.75%)，followed by the stem (8.34%)，and the leaf least (15.91%).With the increase of NaCl concentration，the Na+ content in different tissues showed a significant increase trend.Under 50，100 mmol·L-1 and 200 mmol·L-1 NaCl stress，the Na+ content in roots increased 1.12，2.08 times and 4.22 times，respectively，compared with the control.The Na+ content showed that leaves (18.46 mg·g-1)>stems (2.58 mg·g-1)>roots (1.77 mg·g-1).With the increase of NaCl concentration，the changes of net accumulation and relative net accumulation of Na+ in different tissues was different.The net Na+ accumulation and relative net accumulation showed that leaves (70.99 mg·plant-1 and 68.53%)>roots (28.03 mg·plant-1 and 26.97%)>stems (4.60 mg·plant-1 and 4.50%).In conclusion，our findings suggested that，C.heterophylla × C.avellana could improve the root-shoot ratio by allocating a large proportion of biomass to the root under salt stress.At the same time，the root transports the absorbed excess Na+ to the leaves，and finally become the main storage tissue of Na+.On the one hand，it reduced the Na+ toxicity in the root，on the other hand，it enhanced the osmotic potential difference between the aboveground and underground，thus maintaining normal physiological functions.C.heterophylla×C.avellana had a certain salt tolerance，which could be reasonably developed and utilized as an eco-economical tree species in saline-alkali areas of Xinjiang.

References:

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Last Update: 2023-11-28