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Effects of drought on non-structural carbohydrates and C,N,and P stoichiometric characteristics of Pinus yunnanensis seedlings

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Journal of Forestry Research 2024年第1期35卷 90-102页

作者： Zhijuan Zhao Lina Wang Yuanxi Liu Jianli Sun Jiandong Xiao Qiong Dong Lianfang Li Wanjie Zhang Chao Wang Junwen Wu College of Forestry Southwest Forestry UniversityKunming 650224YunnanPeople’s Republic of China

To study non-structural carbohydrate character-istics and nutrient utilization strategies of Pinus yunnanen-sis under continuous drought conditions,2-year-old seed-lings were planted in pots with appropriate water,light and moderate and severe drought treatments[(80±5),(65±5),(50±5),and(35±5)%of field water-holding capacity].non-structural carbohydrates,carbon(C),nitrogen(N),and phosphorus(P)concentrations were measured in each plant *** results show that:(1)With increasing drought,non-structural carbohydrates gradually increased in leaves,stems,and coarse roots,while gradually decreased in fine roots;(2)C concentrations of all were relatively stable under different stress *** utilization of each component increased under light and moderate drought conditions,while N and P utilization efficiency of each plant component decreased under severe *** was mainly restricted by N,first decreasing and then increasing with increased drought;(3)There was a correlation between the levels of non-structural carbohydrates and C,N,and P in each *** in N concentration affected the interconversion between soluble sugar and starch,which play a regulatory role in the fluctuation of the concentration of non-structural carbohydrates;and,(4)Plasticity analysis showed that *** seedlings responded to drought mainly by altering starch concentration,the ratio of soluble sugar to starch in leaves and stems,and further by alter-ing N and P utilization ***,these results suggest that the physiological activities of all organs of *** seedlings are restricted under drought and that trade-offs exist between different physiological indicators and *** findings are helpful in understanding non-structural carbohydrate and nutrient adaptation mechanisms under drought in *** seedlings.

关键词： Pinus yunnanensis seedlings Drought non-structural carbohydrates C,N,P stoichiometric characteristics

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Impacts of Defoliation on Morphological Characteristics and non-structural carbohydrates of Populus talassica × Populus euphratica Seedlings

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1689-1703页

作者： Mengxu Su Zhanjiang Han Zhen Zhao Xiaofeng Wu Jiaju Wu College of Life Science and Technology Tarim UniversityXinjiang Production and Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim BasinAlar843300China Agricultural Science Research Institute of the First Division Xinjiang Production and Construction CorpsAlar843300China

Leaves are important‘source’organs that synthesize organic matter,providing carbon sources for plant ***,we used Populus talassica×Populus euphratica,the dominant species in ecological and timber forests,to simulate carbon limitation through artiﬁcial 25%,50%,and 75%defoliation treatments and explore the effects on root,stem,and leaf morphology,biomass accumulation,and carbon allocation *** the 60th d after treat-ment,under 25%defoliation treatment,the plant height,speciﬁc leaf weight,root surface area and volume,and concentrations of non-structural carbohydrates in stem and root were signiﬁcantly increased by 9.13%,20.00%,16.60%,31.95%,5.12%,and 9.34%,respectively,relative to the *** was no signiﬁcant change in the growth indicators under 50%defoliation treatment,but the concentrations of non-structural carbohydrates in the leaf and stem signiﬁcantly decreased,showing mostly a negative correlation between *** opposite was observed in the *** 75%defoliation treatment,the plant height,ground diameter,leaf number,single leaf area,root,stem,and total biomass were signiﬁcantly reduced by 14.15%,10.24%,14.86%,11.31%,11.56%,21.87%,and 16.82%,respectively,relative to the *** concentrations of non-structural carbohydrates in various organs were signiﬁcantly reduced,particularly in the consumption of the starch concentrations in the stem and *** results indicated that carbon allocation strategies can be adjusted to increase the con-centration of non-structural carbohydrates in root and meet plant growth needs under 25%and 50%***,75%defoliation signiﬁcantly limited the distribution of non-structural carbohydrates to roots and stems,reduced carbon storage,and thus inhibited plant ***-induced carbon limitation altered the carbon allocation pattern of ***×***,and the relationship between carbon reserves in roots and tree growth recovery after defoliation was *** study

关键词： Populus talassica×Populus euphratica defoliation carbon limitation carbon allocation non-structural carbohydrates

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The effects of stump size and within-gap position on sprout non-structural carbohydrates concentrations and regeneration in forest gaps vary among species with different shade tolerances

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Ecological Processes 2021年第1期10卷 337-350页

作者： Ting Zhang Qiaoling Yan G.Geoff Wang Jiaojun Zhu CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyShenyang 110016China Qingyuan Forest CERN Chinese Academy of SciencesShenyang 110016China Department of Forestry and Environmental Conservation Clemson UniversityClemsonSC 29634USA

Background:To restore secondary forests(major forest resources worldwide),it is essential to accelerate the natural regeneration of dominant trees by altering *** gaps are products of various disturbances,ranging from natural storms or wildfires to anthropogenic events like logging and slashing-andburning,and sprouts of most tree species with non-structural carbohydrates(NSCs)storage can regenerate from stumps after gap ***,how the stump sprouts with diverse NSCs storages and stump sizes(i.e.,diameters)adapt to various micro-environments of within-gap positions remains *** in this study,we monitored the stump sprout regeneration(density,survival,and growth)and NSCs concentrations of three dominant tree species with different shade tolerances and varying stump diameters at five within-gap positions for the first two consecutive years after gap ***:Stump diameter was positively correlated with sprout density,growth,and survival of all three tree species,but insignificantly related with sprout NSCs concentrations at the early stage after gap *** effect of within-gap position on sprout NSCs concentrations was different among *** an environmental adaptation of two growing seasons,the north of gap(higher light availability and lower soil moisture habitat)was the least conducive for shade-intolerant Quercus mongolica to accumulate leaf NSCs,and the east of gap(shadier and drier habitat)was conducive to increasing the leaf NSCs concentrations of shade-tolerant Tilia ***:Within-gap position significantly affected leaf NSCs concentrations of all three tree species,but most of the sprout growth,survival,and stem NSCs concentrations were independent of the various within-gap *** stump diameter,the NSCs stored in stump and root systems and the interspecific differences in shade tolerance also contributed more in sprout regeneration at the early stage(2 years)of g

关键词： non-structural carbohydrates Sprout regeneration Sprout growth Sprout survival Within-gap position Stump size

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Contributions of Rice Stem Large and Small Vascular Bundles on Translocation of non-structural carbohydrates

Contributions of Rice Stem Large and Small Vascular Bundles ...

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第十九届中国作物学会学术年会

作者： Guo Zhang Kehui Cui National Key Laboratory of Crop Genetic Improvement Ministry of Agriculture Key Laboratory of Corp Ecophysiology and Farming System in the Middle Reaches of the Yangtze River College of Plant Science and Technology Huazhong Agricultural University

The non-structural carbohydrates(NSC) are a significant source of assimilates for grain yield formation in rice(Oryza sativa L.). Starch to sucrose conversion and phloem loading after heading, play important roles in rice stem(culm and leaf sheath) NSC remobilization. In the present study, four recombinant inbred lines of rice, R032, R191, R046, and R146 have been tested for stem large(LVB) and small vascular bundles(SVB) identifying NSC translocation under two nitrogen treatments in the field. From heading date(HD) to 28 d after heading, starch density in parenchyma cells surrounding SVB decreased significantly higher than those surrounding LVB. After HD, relative expression of α-amylase and sucrose synthase proteins increased NSC remobilization in parenchyma cells(PCs) surrounding SVB. Higher plasmodesmata densities at the interfaces of sieve element(SE) and companion cell(CC), and CC with its surrounding PCs, and between PCs in phloem of SVB, as well as higher relative expression of sucrose transporter in phloem of SVB enhanced phloem loading from stem to grain. The number and cross sectional area of SVB showed significantly positive correlations with apparent transferred mass of NSC from stems. The results indicate that SVB take a higher contribution to stem NSC translocation than LVB.

关键词： large and small vascular bundles non-structural carbohydrates plasmodesma rice(Oryza sativa L.) sucrose transporter

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non-structural carbohydrate levels of three co-occurring understory plants and their responses to forest thinning by gap creation in a dense pine plantation

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Journal of Forestry Research 2015年第2期26卷 391-396页

作者： Zhe Wang Weikai Bao Xiaoli Yan Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization Chengdu Institute of BiologyChinese Academy of Sciences Key Laboratory for Bio-Resource and Eco-environment of Ministry of Education College of Life ScienceSichuan University University of Chinese Academy of Sciences

We investigated non-structural carbohydrates（NSC） levels and components（starch,glucose,fructose and sucrose） in the leaves of three typical co-occurring forestfloor plants,moss Eurhynchium savatieri（ES）,fern Parathelypteris nipponica（PN） and forb Aruncus sylvester（AS） in a 30-year-old Chinese pine（Pinus tabulaeformis）plantation forest on the eastern Tibetan *** also explored their responses to three gap creation treatments（control and two gap creations of 80 and 110 m2） based on NSC *** had the highest leaf NSC level of the three plants,with AS second and ES *** was the predominant component of NSC and the contents of glucose were higher than those of fructose or sucrose for all three *** NSC level of ES in intermediate gaps was significantly higher than at control *** also had higher NSC levels in both small and intermediate gaps than in control *** the differences between treatments were not obvious for *** results suggest that ES and PN benefit from gap formation while the two species have different NSC response sensitivities to gap size,but the leaf NSC level of AS is less sensitive to the disturbance.

关键词： Forest-floor plant Gap thinning Light radiation Moss non-structural carbohydrates

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Responses and sensitivity of N, P and mobile carbohydrates of dominant species to increased water, N and P availability in semi- arid grasslands in northern China

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Journal of Plant Ecology 2017年第3期10卷 486-496页

作者： Xue Wang Zhuwen Xu Caifeng Yan Wentao Luo Ruzhen Wang Xingguo Han Yong Jiang Mai-He Li Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesNo.72 Wenhua RoadShenhe DistrictShenyang 110016China College of Resources and Environment University of Chinese Academy of SciencesNo.19A Yuquan RoadShijingshan DistrictBeijing 100049China Forest dynamics Swiss Federal Research Institute WSlZuercherstrasse 111CH-8903 BirmensdorfSwitzerland

Aims We aimed to improve the understanding of the carbon and nutri-ent physiological responses and adaptation of semi-arid grassland plants to environmental *** We investigated plant leaf non-structural carbohydrate(NSC=solu-ble sugars+starch),nitrogen(N)and phosphorus(P)levels in an Inner Mongolian semi-arid grassland community treated with water,N and P additions for 8 *** dominant grasses(Agropyron cris-tatum(L.)Gaertn.,Stipa krylovii Roshev.)and two forbs(Artemisia frigida Willd.,Potentilla bifurca L.)were *** Findings Water addition decreased plant leaf N and P concentrations,whereas N and P addition increased them,indicating that the semi-arid grassland studied suffers from a shortage of N and P *** N and P addition decreased the levels of soluble sugars,starch and thus also NSC in plant leaves,which may be attributed to(i)increased carbohydrate consumption associated with a higher growth rate,and(ii)a dilution effect of greater plant size under N and P *** addition tended to increase the leaf NSC levels both in the grasses(+9.2%)and forbs(+0.6%only),which may be a result of increased photosynthesis of plants with increased water *** conditions of ambient and increased water supply in the present study,N addition resulted in an N/P ratio of>16 in the grasses but a significantly lower N/P ratio of<11 in the forb *** finding implies that growth of the two grass spe-cies will be limited mainly by P availability but the forbs will still be mainly limited by N supply if N deposition,alone or in combination with summer precipitation,continues to increase as predicted in Inner Mongolia.

关键词： climate change non-structural carbohydrates perennial grasses perennial forbs steppe

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