Unequal nitrogen translocation pattern caused by clonal integration between connected ramets ensures necessary nitrogen supply for young Moso bamboo growth

Shi, Man; Zhang, Junbo; Sun, Jilei; Li, Quan; Lin, Xinchun; Song, Xinzhang

doi:10.1016/j.envexpbot.2022.104900

Cited by 16 publications

(18 citation statements)

References 38 publications

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“…Moreover, bamboos are clonal plants and have the trait of clonal integration, which can translocate resources (photosynthate, mineral nutrients, water, etc.) between ramets connected with rhizomes along a source-sink gradient ( Pitelka and Ashmun, 1985 ; Alpert, 1991 ; Price et al., 1996 ; Dong et al., 2019 ; Shi et al., 2022 ). As for the strip clear-cutting system, bamboos in the uncut strip were source ramets and could provide resources to sink ramets (newborn bamboos) in the cut strip to support their growth ( D’hertefeldt and Jónsdóttir, 1994 ; Chen et al., 2015 ; Wang et al., 2016 ; Shi et al., 2021 ; Zheng et al., 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Application of the strip clear-cutting system in a running bamboo (Phyllostachys glauca McClure) forest: feasibility and sustainability assessments

Liang,

Wang,

Shen

et al. 2024

Front. Plant Sci.

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IntroductionAs a renewable forest resource, bamboo plays a role in sustainable forest development. However, traditional cutting systems, selection cutting (SeC) and clear-cutting (ClC), result in an unsustainable production of bamboo forests due to labor-consuming or bamboo degradation. Recently, a strip clear-cutting (StC) was theoretically proposed to promote the sustainability of bamboo production, while little is known about its application consequence.MethodsBased on a 6-year experiment, we applied the strip clear-cutting system in a typical running bamboo (Phyllostachys glauca McClure) forest to assess its feasibility and sustainability. Using SeC and ClC as controls, we set three treatments with different strip widths (5 m, 10 m, and 20 m) for strip clear-cutting, simplified as StC-5, StC-10, and StC-20, respectively. Then, we investigated leaf physiological traits, bamboo size and productivity, population features, and economic benefits for all treatments.ResultsThe stands managed by StC had high eco-physiological activities, such as net photosynthetic rate (Pn), photosynthetic nitrogen use efficiency (PNUE), and photosynthetic phosphorus use efficiency (PPUE), and thus grew well, achieved a large diameter at breast height (DBH), and were tall. The stand biomass of StC (8.78 t hm-2 year-1) was 1.19-fold and 1.49-fold greater than that of SeC and ClC, respectively, and StC-10 and StC-20 were significantly higher than SeC or ClC (p< 0.05). The income and profit increased with the increase in stand density and biomass, and StC-20 and StC-10 were significantly higher than SeC or ClC (p< 0.05). Using principal components analysis and subordinate function analysis, we constructed a composite index to indicate the sustainability of bamboo forests. For the sustainability assessment, StC-10 had the highest productive sustainability (0.59 ± 0.06) and the second highest economic sustainability (0.59 ± 0.11) in all cutting treatments. StC-10 had the maximum overall sustainability, with a value of 0.53 ± 0.02, which was significantly higher than that of ClC (p< 0.05).ConclusionThe results verified that StC for Phyllostachys glauca forests is feasible and sustainable as its sustainability index outweighs those of traditional cutting systems (SeC and ClC), and 10 m is the optimum distance for the strip width of StC. Our findings provide a new cutting system for managing other running bamboo forests sustainably.

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Section: Discussionmentioning

confidence: 99%

Application of the strip clear-cutting system in a running bamboo (Phyllostachys glauca McClure) forest: feasibility and sustainability assessments

Liang,

Wang,

Shen

et al. 2024

Front. Plant Sci.

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“…3G ). While most nitrogen needed to support the fast growth is potentially remobilised from the mature bamboos and transferred via the rhizome ( Shi et al 2021 , 2022 ; Zhai et al 2022 ), additional nitrogen assimilation can occur.…”

Section: Discussionmentioning

confidence: 99%

Sources of carbon supporting the fast growth of developing immature moso bamboo (Phyllostachys edulis) culms: inference from carbon isotopes and anatomy

et al. 2023

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Phyllostachys edulis is a spectacularly fast-growing species that completes its height growth within two months after the shoot emerges without producing leaves (fast-growing period, FGP). This phase was considered heterotrophic, the carbon necessary for the growth being transferred from the mature culms via the rhizomes, although previous studies observed key enzymes and anatomical features related to C4-carbon fixation in developing culms. We tested whether C4-photosynthesis or dark-CO2 fixation through anaplerotic reactions significantly contributes to the FGP, resulting in differences in the natural abundance of δ 13C in bulk organic matter and organic compounds. Further, pulse- 13CO2-labelling was performed on developing culms, either from the surface or from the internal hollow, to ascertain whether significant CO2 fixation occurs in developing culms. δ 13C of young shoots and developing culms were higher (-26.3–-26.9‰) compared to all organs of mature bamboos (-28.4–-30.1‰). Developing culms contained chlorophylls, most observed in the skin tissues. After pulse- 13CO2-labelling, the polar fraction extracted from the skin tissues was slightly enriched in 13C, and only a weak 13C enrichment was observed in inner tissues. Main carbon source sustaining the FGP was not assimilated by the developing culm, while a limited anaplerotic fixation of respired CO2 cannot be excluded and is more likely than C4-photosynthetic carbon fixation.

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“…Bamboo culms are connected with each other through the rhizome-root system, with strong physiological integration functions and environmental adaptability ( Zhuang et al., 2011 ). Physiological integration is an important characteristic of clonal plants, that refers to the translocation and sharing of photosynthates, water and mineral nutrients between the connected ramets by rhizomes, stolons, or roots ( He et al., 2010 ; Portela et al., 2021 ; Shi et al., 2021 ; Wang et al., 2021 ; Li et al., 2022 ; Shi et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of physiological integration on nitrogen use efficiency of moso bamboo in homogeneous and heterogeneous environments

Zhao

Cai

2023

Front. Plant Sci.

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IntroductionMoso bamboo is one of the important clonal plants with complex underground rhizome-root system. Ramets connected by rhizome can translocate and share nitrogen (N), which may affect the nitrogen use efficiency (NUE) of moso bamboo. The aims of this study were to investigate the mechanisms of N physiological integration and its relationship with NUE of moso bamboo.MethodsA pot experiment was conducted to trace the movement of 15N between the connected ramets of moso bamboo in both homogeneous and heterogeneous N environments.ResultsResults showed that N translocation within clonal fragments of moso bamboo was detected in both homogeneous and heterogeneous environments. The intensity of physiological integration (IPI) was significantly lower in homogeneous environments than that in heterogeneous environments. 15N translocation between the connected ramtes of moso bamboo was determined by the source-sink relationship in heterogeneous environments, and the 15N allocation of the fertilized ramet was higher than that of the connected unfertilized ramet. The NUE of connected treatment was significantly higher than that of severed treatment, which suggested that physiological integration significantly improved the NUE of moso bamboo. In addition, the NUE of moso bamboo was significantly higher in heterogeneous environments than that in homogeneous environments. The contribution rate of physiological integration (CPI) on NUE in heterogeneous environments was significantly higher than that in homogenous environments.DiscussionThese results will provide theoretical basis for precision fertilization in moso bamboo forests.

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Unequal nitrogen translocation pattern caused by clonal integration between connected ramets ensures necessary nitrogen supply for young Moso bamboo growth

Cited by 16 publications

References 38 publications

Application of the strip clear-cutting system in a running bamboo (Phyllostachys glauca McClure) forest: feasibility and sustainability assessments

Application of the strip clear-cutting system in a running bamboo (Phyllostachys glauca McClure) forest: feasibility and sustainability assessments

Sources of carbon supporting the fast growth of developing immature moso bamboo (Phyllostachys edulis) culms: inference from carbon isotopes and anatomy

Effects of physiological integration on nitrogen use efficiency of moso bamboo in homogeneous and heterogeneous environments

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