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Physiology Response of Dendrobium ‘Sonia Hiasakul’ Seedling on Different Degrees of Low Temperature Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年04
Page:
62-66
Research Field:
Publishing date:

Info

Title:
Physiology Response of Dendrobium ‘Sonia Hiasakul’ Seedling on Different Degrees of Low Temperature Stress
Author(s):
HE Jiaqi1; 2; LU Shunjiao2; REN Yu2; YANG Guangsui2; YIN Junmei2
(1.College of Horticulture and Landscape，Hainan University，Haikou，Hainan 570228；2.Tropical Crops Genetic Resource Institute，Chinese Academy of Tropical Agriculture Science/Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China，Danzhou,Hainan 571737)
Keywords:
Dendrobium; low temperature; cold tolerance
PACS:
-
DOI:
10.11937/bfyy.201704015
Abstract:
Using the method of artificial simulation of low temperature，the four physiological indexes of Dendrobium ‘Sonia Hiasakul’ seedling leaves，including the soluble protein，chlorophyll，malondialdehyde (MDA) and free proline were measured to study the response of Dendrobium to different low temperature （15，10，5 ℃）and different times（1，2，4，8，24 hours and 2，4，8，16 days）.Meanwhile，the situation of yellow leaves rate，defoliation rate and restoration of treantment plants were analyzed to discuss the effects of different temperature stress on cold resistance mechanism of Dendrobium.The results showed that with the decrease of treatment temperature and the prolonging of treatment time，the content of soluble protein fluctuated greatly and increased at first then decreased finally increased，and at 15 ℃,16 days treatment to the peak，356.96 μg?g-1；the contents of MDA and free proline gradually increased，nevertheless，there was a certain difference in the increasing speed and amplitude；the content of chlorophyll generally decreased，at 5 ℃,16 days to the lowest，was 0.109 4 mg?g-1.Dendrobium seedlings first appeared a large number of yellow leaves，then the yellows turned into fallen leaves.According to the number of newborn leaves，treatment of 5 ℃,1 or 2 hours could promote the germination of new leaves，and did not affect normal growth of plants.

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Last Update: 2017-03-23