Author:
Yuan Zhongxun,Ni Xilu,Chen Chunhua,Zhang Songlin,Chen Xuemei,Yang Zhihua,Li Changxiao
Abstract
Abstract
Background
The bermudagrass (Cynodon dactylon (L.) Pers) roots responded differently in terms of morphological and anatomical characteristics under diverse submergence conditions, and they developed aerenchyma under non-flooding condition. In order to understand these mechanisms, bermudagrass cuttings were used as experimental material to examine their biomass, root morphology, and aerenchyma formation under three different water treatments, including control (CK), shallow submergence (SS), and deep submergence (DS).
Results
The total root length, root volume, root surface area, and biomass of bermudagrass were largest in CK, followed by SS and DS. However, the average root diameter was greater in each of DS and SS than that in CK. Root aerenchyma formation was observed in CK, and submergence boosted the aerenchyma formation and the root cavity rate. Furthermore, our study found that the process of aerenchyma formation began with the increase of cell volume and cell separation to form a narrow space, and these cells gradually died to form matured aerenchyma cavity, which belongs to schizo-lysigenous aerenchyma. Meanwhile, typical biomarkers of programmed cell death were also observed.
Conclusion
Overall, these results suggested that submergence inhibited the accumulation of biomass and root growth, but facilitated aerenchyma formation by increasing root diameter.
Funder
Ningxia Key Research and Development Program
Natural Science Foundation of Ningxia
National Natural Science Foundation of China
Chongqing Municipality Housing and Urban Construction Committee
Forestry Extension Project of China Central Finance
Chongqing Science and Technology Bureau
International Sci-Tech Cooperation Project of Ministry of Science and Technology
Chongqing Municipality Key Forestry Research Project
Publisher
Springer Science and Business Media LLC
Reference56 articles.
1. Candan N, Tarhan L. Tolerance or sensitivity responses of Mentha pulegium to osmotic and waterlogging stress in terms of antioxidant defense systems and membrane lipid peroxidation. Environ Exp Bot. 2012;75:83–8.
2. Wu JG, Huang JH, Han XG, Gao XM, He FL, Jiang MX, et al. The Three Gorges Dam: an ecological perspective. Front Ecol Environ. 2004;2:241–8.
3. Liu ZB, Cheng RM, Xiao WF, Guo QS, Wang N. Effect of off-season flooding on growth, photosynthesis, carbohydrate partitioning, and nutrient uptake in Distylium chinense. PLoS One. 2014;9:1–9.
4. Fan DY, Xiong GM, Zhang AY, Liu X, Xie ZQ, Zhao JL. Effect of water-level regulation on species selection for ecological restoration practice in the water-level fluctuation zone of Three Gorges Reservoir. Chinese J Plant Ecol. 2015;39:416–32.
5. Zhang M, Chen FQ, Wu Y, Ma YR, Guan SP, Huang YW. Characteristics of the soil seed bank of planted and natural restored draw-down zones in the Three Gorges Reservoir Region. Ecol Eng. 2017;103:127–33.
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