Internode morphometrics and allometry of Tonkin Cane Pseudosasa amabilis
Date
2017-10
Journal Title
Journal ISSN
Volume Title
Publisher
John Wiley & Sons Ltd
Abstract
Pseudosasa amabilis (McClure) (Poales: Gramineae) is a typical bamboo species naturally
distributed in large area of south China and famous for its culm strength. Although
bamboos were found to share the same development rule, the detailed internode morphology
of bamboo culm was actually not fully expressed. We explored internode
morphology of P. amabilis using 11 different physical parameters in different dimensions
(1–4). As Taylor’s power law (TPL) is generally applicable to describe relationship
between mean and variance of population density, here we used TPL to evaluate the
differences between internodes, and further, the relationship between dimension and
TPL. Results showed that length (L), hollow radius (HR), hollow area (HA), hollow
cylinder
volume (HCV), total cylinder volume (TCV), density (De), and weight (W)
all presented positive skewed distribution in varying degrees. For the basic one-dimensional
parameters, the 9th internode was the longest, the 7th the heaviest, while
thickness (T) decreased with internodes. Diameter (D) decreased in general but with
an inconspicuous local mode at the 5–6th internodes, potentially due to the rapid
height growth. The longest (9th) internode was the “turning point” for T-D
and HR-D
relationships. Scatter plot changing trends of W to the one-dimensional
parameters
after the heaviest (7th) internode were reversed, indicating a deceleration of growth
speed. TPL was not holding well in one-dimensional
parameters (R2: 0.5413–0.8125),
but keep increasing as the parameter’s dimension increasing (R2 > 0.92 for two-dimensional,
R2 > 0.97 for three-dimensional,
and R2 > 0.99 for four-dimensional
parameters.),
suggesting an emergence mechanism of TPL related to both the physical
dimensions of morphological measures and the allometric growth of bamboo. From
the physical fundamental level, all existences are the expression of energy distribution
in different dimensions, implying a more general rule that energy distribution holds
better TPL in higher dimension level.
Description
CITATION: Cheng, L. et al. 2017. Internode morphometrics and allometry of Tonkin Cane
Pseudosasa amabilis. Ecology & Evolution, 7(222):9651-9660. doi:10.1002/ece3.3483.
The original publication is available at https://onlinelibrary.wiley.com
The original publication is available at https://onlinelibrary.wiley.com
Keywords
Bamboo -- China, Agriculture -- Research -- China, Morphometrics, Mathematical statistics, Linear regression (Statistics), Taylor’s power law (Ecology), Plant allometry, Tonkin cane
Citation
Cheng, L. et al. 2017. Internode morphometrics and allometry of Tonkin Cane Pseudosasa amabilis. Ecology & Evolution, 7(222):9651-9660. doi:10.1002/ece3.3483.