文献类型：期刊文献

英文题名：Clonal integration alters metabolic non-structural carbohydrate processes of a dwarf bamboo under negatively correlated light and soil water conditions

作者：Guo, Ziwu[1,4] Li, Qin[1] Wu, Jing[2] Yang, Liting[1] Fan, Lili[1] Zhang, Le[1] Qin, Minghui[3] Chen, Shuanglin[1]

第一作者：郭子武;Guo, Ziwu

通信作者：Guo, ZW[1];Chen, SL[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Taizhou Univ, Inst Wetland Ecol & Clone Ecol, Sch Life Sci, Taizhou 318000, Zhejiang, Peoples R China;[3]Zhejiang A & Forestry Univ, Bamboo Ind Inst, Hangzhou 311300, Peoples R China;[4]Zhejiang Key Lab Forest Genet & Breeding, Hangzhou 311400, Zhejiang, Peoples R China

年份：2024

卷号：306

外文期刊名：AGRICULTURAL WATER MANAGEMENT

收录：;EI(收录号：20244617345990);Scopus(收录号：2-s2.0-85208347368);WOS:【SCI-EXPANDED(收录号:WOS:001356572800001)】；

基金：This study was supported by the National Natural Science Foundation of China (grants 31770447, 31870610) , the Fundamental Research Funds of CAF (CAFYBB2022SY013) and the Public Welfare Program of Zhejiang Province (LGN22C160015).

语种：英文

外文关键词：Bamboo; Habitat heterogeneity; Complementary resources; Carbon metabolism; Clonal integration

摘要：Generally spoken that light and soil water conditions within patches often negatively correlate, significantly affecting the growth of clonal plants. But the role of clonal integration in modulating carbohydrate metabolism of paired ramets under heterogeneous environments remains unclear. Hence the initial research is performed focusing on water and carbohydrate sharing among ramets under heterogeneous environments and its impact on non-structural carbohydrate (NSC) accumulation and conversion of whole clonal system. Connected and disconnected clonal fragments of dwarf bamboo were planted in four heterogeneous environments differing in patch contrast with negatively correlated light and soil water. Photosynthetic capacity, NSC content, and its metabolic characteristics were measured, and the effects of water and NSC sharing on the performance of paired bamboo ramets were also analyzed. Leaf photosynthetic rate (P-n) and NSC content of shade ramets ranged from 7.06 to 8.56 mu mol center dot m(- 2)center dot s(- 1), 140.85-176.12 mg.g(- 1), and those for unshaded ramets were 3.98 similar to 6.97 mu mol center dot m(- 2)center dot s(- 1) and 129.58-170.81 mg.g(-1), respectively. Rhizome connection significantly decreased leaf P-n, NSC, chlorophyll, and RuBisCo in shaded ramets but increased these parameters in unshaded ramets. High water contrast led to higher leaf P-n, NSC, chlorophyll, and RuBisCo activity in both ramets with rhizome connection. Moderately shaded treatments (50 % shading) increased leaf P-n, NSC, and chlorophyll content in both shaded and unshaded ramets with rhizome connection. Rhizome connection significantly decreased the activities of sucrose synthase (SS), sucrose phosphate synthase (SPS), and amylase in shaded ramets, but increased SS, SPS, amylase, and invertase (INV) in unshaded ramets. Water sharing promoted both leaf NSC and P-n in ramets growing under high light but low soil water conditions when connected to ramets growing under shading but higher soil water conditions. The mutual conversion of starch into sugar between paired ramets enhanced the fitness of the entire clonal system. Obviously the findings provide new insights into the adaptive strategies of dwarf bamboo to drought and shading stress through physiological integration (water and NSC sharing) and NSC conversion, which could help predict the impact of climate change on bamboo growth and productivity.