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. 2020 Jan 23;10(1):1015.
doi: 10.1038/s41598-020-57643-1.

Accessing the nursing behaviour of Moso bamboo (Phyllostachys edilus) on carbohydrates dynamics and photosystems

Shitephen Wang  1 , Tsai-Huei Chen  2 , En-U Liu  3 , Chiung-Pin Liu  4
Affiliations

Accessing the nursing behaviour of Moso bamboo (Phyllostachys edilus) on carbohydrates dynamics and photosystems

Shitephen Wang et al. Sci Rep. .

Abstract

Nursing behaviour, also known as breastfeeding behaviour, is the feeding of juvenile individuals with nutrients or proteins from matures especially in mammals. As a hypothetical phenomenon in bamboo forests, mature bamboos have transferred photoassimilates to young bamboos for recovering and rebuilding their photosystems especially in winter. This process is accompanied by changes in the ability of photosystems and the mass fraction of non-structural carbohydrates (NSCs), structural carbohydrates (SCs), and lignin. We analysed carbohydrates and chlorophyll fluorescence to compare the physiological traits in mature (age 2, 3, 4) and immature (age 1) Moso bamboos (Phyllostachys edilus) during a year using the Portable Chlorophyll Fluorometer (PCF) and the Liquid Chromatographic (LC) method. The results showed that the mass fraction of total soluble carbohydrates (TSCs) and starch in the bottom of bamboo at age 1 was higher than other parts and ages in spring, whereas the mass fraction of TSCs, starch, and sucrose at age 3 was higher than other parts and ages in winter. The Fv/Fm, an indicator to reveal photosystems were functional or not, at age 1 dramatically dropped when the cold current attacked first time in October, and then quickly recovered in November. Our findings indicate that mature bamboos very possibly provide carbohydrates to immature bamboos and help them rebuild their photosystems when a bamboo forest resists cold stress.

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Conflict of interest statement

We declare that we have no financial and personal relationships with other people or organisations that can inappropriately influence our work. There is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled.

Figures

Figure 1
Figure 1
Carbohydrates transition pathway among young, mature bamboo, and rhizome when Moso bamboo forest when the cold current attack. This figure was designed and obtained by Shitephen Wang using Adobe Photoshop cc 2016 & Adobe Illustrator cc 2016 (Adobe Systems Software Ireland Ltd).
Figure 2
Figure 2
The mass fraction of total soluble carbohydrate of Moso bamboo in different ages during the year. Values with different letters are significantly different at 5% significant level by LSD.
Figure 3
Figure 3
The mass fraction of starch of Moso bamboo in different ages during the year.
Figure 4
Figure 4
The mass fraction of different soluble carbohydrates of Moso bamboo in different ages during the year.
Figure 5
Figure 5
The sucrose/starch ratio of Moso bamboo in different ages during one year.
Figure 6
Figure 6
PSII maximum quantum yield (Fv/Fm) in different ages during one year.
Figure 7
Figure 7
PSII minimum fluorescence (Fo) in different ages during one year.
Figure 8
Figure 8
PSII quantum yield (Φ) in different ages during one year.
Figure 9
Figure 9
Photochemical quenching (qP) of PSII in different ages during one year.
See this image and copyright information in PMC

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