Wu Chongyang, Tanaka Ryota, Fujiyoshi Kyohei, Akaji Yasuaki, Hirobe Muneto, Miki Naoko, Li Juan, Sakamoto Keiji, Gao Jian
Beijing for Bamboo & Rattan Science and Technology/International Centre for Bamboo and Rattan, Key Laboratory of National Forestry and Grassland Administration, Beijing 100102, China.
Faculty of Agriculture, Okayama University, Okayama 700-8530, Japan.
Plants (Basel). 2024 Mar 4;13(5):719. doi: 10.3390/plants13050719.
Phenological gaps exert a significant influence on the growth of dwarf bamboos. However, how dwarf bamboos respond to and exploit these phenological gaps remain enigmatic. The light environment, soil nutrients, leaf morphology, maximum photosynthetic rate, foliage dynamics, and branching characteristics of were examined under the canopies of and . The goal was to elucidate the adaptive responses of to phenological gaps in the forest understory. The findings suggest that phenological gaps under an canopy augment the available biomass of , enhancing leaf area, leaf thickness, and carbon content per unit area. However, these gaps do not appreciably influence the maximum photosynthetic rate, total leaf number, leaf lifespan, branch number, and average branch length. These findings underscore the significant impact of annually recurring phenological gaps on various aspects of growth, such as its aboveground biomass, leaf morphology, and leaf biochemical characteristics. It appears that leaf morphology is a pivotal trait in the response of to phenological gaps. Given the potential ubiquity of the influence of phenological gaps on dwarf bamboos across most deciduous broadleaf forests, this canopy phenomenon should not be overlooked.
物候间隙对矮竹的生长有重大影响。然而，矮竹如何响应并利用这些物候间隙仍不清楚。在[具体树种1]和[具体树种2]的树冠下，研究了[矮竹品种]的光照环境、土壤养分、叶片形态、最大光合速率、叶片动态和分枝特征。目的是阐明[矮竹品种]对林下层物候间隙的适应性反应。研究结果表明，[具体树种1]树冠下的物候间隙增加了[矮竹品种]的可用生物量，提高了叶面积、叶片厚度和单位面积碳含量。然而，这些间隙对最大光合速率、总叶数、叶寿命、分枝数和平均分枝长度没有明显影响。这些发现强调了每年反复出现的物候间隙对[矮竹品种]生长的各个方面，如地上生物量、叶片形态和叶片生化特征的重大影响。看来叶片形态是[矮竹品种]对物候间隙反应的关键特征。鉴于物候间隙对大多数落叶阔叶林矮竹的影响可能普遍存在，这种树冠现象不应被忽视。
