Effects of different light qualities on seedling growth and chlorophyll fluorescence parameters of Dendrobium officinale
-
Yang Wang
and Bingsong Zheng
Abstract
Light is one of the most important environmental factors for plant growth and development. The purpose of this study is to investigate the effects of light quality on seedling growth, chlorophyll pigment content, anti-oxidant systems, chlorophyll fluorescence parameters, photosynthetic efficiency, biological production and active ingredient of polysaccharide accumulation of D. officinale. The results showed that the effects of different light qualities on the growth and development, photosynthetic pigment and chlorophyll fluorescence parameters of D. officinale seedlings were extremely different. Blue light (BL) promoted stem diameter, chlorophyll a, chlorophyll b, and total chlorophyll content. Red light (RL) increased seedling height, relative water content, non photochemical quenching (NPQ), chlorophyll a/b, relative electrolyte conductivity (REC) and extract content; while mixtures of blue and red lights (RBL) accelerated significantly seedling height, malondialdehyde (MDA), superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), maximum quantum yield (Fv/Fm), photochemical quenching (qP), electron transport rate (ETR) and polysaccharide content. Therefore, it was thought that RBL can improve seedling growth and development through enhancing photosynthetic pigment synthesis, antioxidant enzymes activities, PSII system energy conversion and utilization efficiency, and thus delaying leaf senescence to ensure vigorous growth. These results could play an important role in seedling cultivation of D. officinale.
Acknowledgements
This study was supported by the National Natural Science Foundation of China (31070604, 31270716 and 31470683); the Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholar (LR13C160001); Key Agricultural New Varieties Breeding Projects founded by Zhejiang Province Science and Technology Department (2016C02052-12, 2016C02052-13); Postdoctoral research project of Zhejiang Province (2016-73-114-168961); and the Fruit Innovation Team Project of Zhejiang Province (2009R50033). We would like to thank the reviewers for their helpful comments and suggestions regarding the manuscript.
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Abbreviations
- BL
blue light
- RL
red light
- RBL
mixtures of blue plus red lights
- Chl
chlorophyll
- MDA
malondialdehyde
- REC
relative electrolyte conductivity
- RWC
relative water content
- SOD
superoxide dismutase
- POD
peroxidase
- CAT
catalase
- NPQ
non photochemical quenching
- Fv/Fm
maximum quantum yield
- qP
photochemical quenching
- ETR
electron transport rate
© 2017 Institute of botany, Slovak Academy of Sciences
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- Botany
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- Botany
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- Cellular and Molecular Biology
- Citrus flavonoids collectively dominate the α-amylase and α-glucosidase inhibitions
- Zoology
- Distribution, diversity and some ecological characteristics of ostracods (Crustacea: Ostracoda) in Gökçeada (Imbros) Island (Northern Aegean Sea, Turkey)
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- Native crab and crayfish co-occurrence: First evidence in Europe
- Zoology
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