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Research article - Peer-reviewed, 2022

Phenotypic Plasticity of Cunninghamia lanceolata (Lamb.) Hook. Seedlings in Response to Varied Light Quality Treatments

Liu, Qingqing; Huang, Zhijun; Ma, Xiangqing; Tigabu, Mulualem; Xing, Xianshuang; Jin, Shaofei; Liu, Bo;

Abstract

Effects of light quality on phenotypic plasticity in Cunninghamialanceolata (Lamb.) Hook. seedlings during growth and development, and the underlying mechanisms, were investigated. The seedlings showed distinct morphological adjustments when exposed to an equal photosynthetic photon flux density (400 mu mol.m(-2).s(-1)) of different light qualities: monochromatic blue (BL), monochromatic red (RL), monochromatic far-red (FrL), mixed RL and FrL at 1:1 (RFr1:1L), mixed RL and FrL at 1:2 (RFr1:2L), and multi-wavelength white (WL, control). Compared with WL, FrL and BL significantly promoted height increment. However, BL was unfavorable for root growth. The seedling biomass was lower and the root-to-shoot ratio was smaller under BL. RL promoted leaf area enlargement, root growth, axillary bud number, and increased the root-to-shoot ratio, but inhibited stem elongation. Low R/Fr ratios or increased FrL proportion increased seedling stem elongation. The seedling growth under RFr1:1L treatment was poorer than that under other treatments; however, the number of axillary buds was the highest. The plasticity of leaf morphology traits was lower in different treatments, and that of axillary bud traits was crucial in the adaptation of C. lanceolata to light quality. Precise management of light quality and wavelength in controlled environments may maximize the economic efficiency of forest production and enhance its quality.

Keywords

leaf traits; light spectra; red:far-red ratio; root morphology; seedling growth; stem elongation

Published in

Forests

2022, volume: 13, number: 2, article number: 201
Publisher: MDPI

Authors' information

Liu, Qingqing
Fujian Agriculture and Forestry University
Huang, Zhijun
Fujian Agriculture and Forestry University
Ma, Xiangqing
Fujian Agriculture and Forestry University
Fujian Agriculture and Forestry University
Swedish University of Agricultural Sciences, Southern Swedish Forest Research Centre
Xing, Xianshuang
Hydrology Bureau of Shandong Province
Jin, Shaofei
Minjiang University
Liu, Bo
Fujian Agriculture and Forestry University
Liu, Bo
Qufu Normal University

UKÄ Subject classification

Forest Science

Publication Identifiers

DOI: https://doi.org/10.3390/f13020201

URI (permanent link to this page)

https://res.slu.se/id/publ/119088