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Elucidation of microstructural changes in leaves during senescence using spectral domain optical coherence tomography.

Abstract：

:Leaf senescence provides a unique window to explore the age-dependent programmed degradation at organ label in plants. Here, spectral domain optical coherence tomography (SD-OCT) has been used to study in vivo senescing leaf microstructural changes in the deciduous plant Acer serrulatum Hayata. Hayata leaves show autumn phenology and change color from green to yellow and finally red. SD-OCT image analysis shows distinctive features among different layers of the leaves; merging of upper epidermis and palisade layers form thicker layers in red leaves compared to green leaves. Moreover, A-scan analysis showed a significant (p < 0.001) decrease in the attenuation coefficient (for wavelength range: 1100-1550 nm) from green to red leaves. In addition, the B-scan analysis also showed significant changes in 14 texture parameters extracted from second-order spatial gray level dependence matrix (SGLDM). Among these parameters, a set of three features (energy, skewness, and sum variance), capable of quantitatively distinguishing difference in the microstructures of three different colored leaves, has been identified. Furthermore, classification based on k-nearest neighbors algorithm (k-NN) was found to yield 98% sensitivity, 99% specificity, and 95.5% accuracy. Following the proposed technique, a portable noninvasive tool for quality control in crop management can be anticipated.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Anna T,Chakraborty S,Cheng CY,Srivastava V,Chiou A,Kuo WC

doi

10.1038/s41598-018-38165-3

subject

Has Abstract

pub_date

2019-02-04 00:00:00

pages

1167

issue

1

issn

2045-2322

pii

10.1038/s41598-018-38165-3

journal_volume

9

pub_type

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