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Abstract
BackgroundLiriope muscari (Decne.) L.H. Bailey is a valuable horticultural and medicinal plant that grows under a range of light intensities, from high to low, in the understories of shrubs. To understand how this species adapts to these various environments, we selected two groups of lilyturf growing under poplar trees at two different spacings. Each group was divided into three types, open field, forest edge and shaded forest with high, medium and low irradiance levels, respectively, and then we examined their photosynthetic characteristics, physiology and biomasses.ResultsLight saturation point, light compensation point and in situ net photosynthetic rate (PN) were highest in lilyturf growing under high light. In contrast, lilyturf growing under low light had a higher apparent quantum yield and Chl a and b contents, indicating that they adapted to low light. Although the leaves of lilyturf growing under low light were small, their root tubers were heavier.ConclusionsThe research demonstrates the eco-physiological basis of lilyturf’s shade adaptation mechanism as indicated by photosynthetic activity, chlorophyll fluorescence, Chl a, Chl b and Car contents when grown under different irradiances. We believe that lilyturf is a shade-tolerant plant suitable for planting in undergrowth, but attention should be paid to the canopy density of the forest when interplanting. The findings presented here advance our understanding of the photosynthetic characteristics of understory plants and may assist in the optimization of irradiances in the future.
Highlights
Light is a critical resource for plants, in forest understory environments where long periods of low intensity diffuse light are interspersed by brief high intensity light flecks [6]
The maximum illumination value occurred at 13:00 h for all the treatments in the first group, while for the second group it occurred at 11:00 h (Fig. 1A1-2)
Under the same light conditions, the T leaf of the first group was slightly higher than that of the second group, which was related to the photosynthetically active radiation (PAR) of the first group being slightly greater than that of the second group
Summary
Liriope muscari (Decne.) L.H. Bailey is a valuable horticultural and medicinal plant that grows under a range of light intensities, from high to low, in the understories of shrubs. Bailey is a valuable horticultural and medicinal plant that grows under a range of light intensities, from high to low, in the understories of shrubs To understand how this species adapts to these various environments, we selected two groups of lilyturf growing under poplar trees at two different spacings. Light is a critical resource for plants, in forest understory environments where long periods of low intensity diffuse light are interspersed by brief high intensity light flecks [6]. Under-forest illumination conditions are key factors that limit the growth of herbaceous plants in small-scale environments [11]. Research on shade tolerance mainly focused on crops and flowers, with limited reports on the shade tolerance of undergrowth plants in the wild
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