|Table of Contents|

Effects of Simulated Drought Stress on Growth and Photosynthetic Characteristics of Sedum sarmentosum Bunge

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年09
Page:
125-131
Research Field:
Publishing date:

Info

Title:
Effects of Simulated Drought Stress on Growth and Photosynthetic Characteristics of Sedum sarmentosum Bunge
Author(s):
YANG Shujun; LIU Xiao; WANG Ruijie; ZHAO Qing; LIAO Haimin; WANG Jianjian
(College of Life Sciences，Guizhou University，Guiyang，Guizhou 550025)
Keywords:
Sedum sarmentosum Bunge; drought stress; growth; chlorophyll fluorescence parameters
PACS:
-
DOI:
10.11937/bfyy.20183175
Abstract:
In order to study the effects of drought stress on the growth and photosynthetic characteristics of Sedum sarmentosum,taking Sedum sarmentosum as test material,four different drought treatments (1，3，6，9 days) were set up to determine the growth and chlorophyll fluorescence characteristics of Sedum sarmentosum under different drought conditions.The results showed that with the increase of drought degree，the total number of leaves，specific leaf area，leaf thickness,plant height and root length decreased significantly.Root dry weight，stem quality，leaf dry mass and total biomass decreased significantly.Leaf biomass ratio and specific leaf area were significantly reduced，stem biomass ratio increased significantlyand root biomass ratio did not change significantly.Chlorophyll content first increased and then decreased，reached the maximum in mild drought (continuous drought 3 days)，and the lowest in severe drought (continuous drought 9 days).The maximum photochemical quantum yield (Fv/Fm)，electron transport rate (ETR)，and photochemical quenching coefficient (qP) of PSII decreased significantly，while the non-photochemical quenching coefficient (NPQ) increased significantly with the degree of drought.Under drought conditions，the growth and development of Sedum sarmentosum plants were inhibited，the photosynthetic capacity of Sedum sarmentosum seedlings showed some adaptability in mild drought，while the severe drought had a serious impact on seedling photosynthesis.

References:

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Last Update: 2019-06-11