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Interannual dynamics of stemwood nonstructural carbohydrates in temperate forest trees surrounding drought

Journal of forestry Research 2023年第1期34卷 77-86页

作者： Meghan J.Blumstein Morgan E.Furze Department of Organismic and Evolutionary Biology Harvard University26 Oxford StCambridgeMA 02138USA Civil and Environmental Engineering Massachusetts Institute of Technology77 Massachusetts AveRoom 1-290CambridgeMA 02139USA Department of Botany and Plant Pathology Department of Forestry and Natural ResourcesPurdue University915 W State StreetWest LafayetteIN 47907USA

Interactions between water and carbon dynamics underlie drought-related tree *** whole-tree water relations have been shown to play a key role in the response to and recovery from drought,the role of nonstructural carbohydrates(NSC) and how their storage and allocation changes surrounding drought events deserves further attention and is critical for understanding tree ***,we quantified in situ NSC responses of temperate forest trees to the 2016 drought in the northeastern United *** and starch concentrations were measured in the stemwood of five tree species from 2014 to 2019,which allowed us to monitor NSCs in relation to climatic conditions before,during,and after the natural *** found that immediately following the drought,measured stemwood NSC concentrations ***,NSC concentrations rebounded quickly within three ***,trees allocated proportionally more to starch than to sugars following the 2016 *** winter 2017,starch comprised 45% of total stemwood stores,whereas starch made up only 1-2% in other ***,we modeled and assessed the climatic drivers of total NSC concentrations in the *** in total NSC concentrations was significantly predicted by the previous year’s temperature,precipitation,and standardized precipitation-evapotranspiration index(SPEI),with stemwood concentrations decreasing following hotter,drier periods and increasing following cooler,wetter ***,our work provides insight into the climatic drivers of NSC storage and highlights the important role that a tree’s carbon economy may play in its response and recovery to environmental stress.

关键词： Drought Nonstructural carbohydrates Starch metabolism forest trees

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Effect of the seeds provenance and treatment on the germination rate and plants growth of four forest trees species of Cote d’Ivoire

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Journal of forestry Research 2021年第1期32卷 161-169页

作者： Sélastique Doff ou Akaff ou AiméKouassi Kouame Nestor Bi Boh Gore Georges Yao Abessika Henri Kouadio Kouassi Perla Hamon Sylvie Sabatier Jerome Duminil Department for Seeds and Seedlings Production Jean Lorougnon GuédéUniversityBP 150DaloaCote d’Ivoire IRD UMR DIADEB.P.6450134394 Montpellier Cedex 5France CIRAD UMR AMAP34398 MontpellierFrance

The rapid rate of deforestation in Cote d’Ivoire has led to loss of plant species diversity and also threatens some commercial tree species with *** reforestation and aff orestation has been ***,for some species,the numbers of surviving transplants has ***,it is necessary to develop properly adapted and resilient genotypes that can eff ectively support the programs of forest *** this context we evaluated the eff ects of the provenances of seeds and of various treatments on the germination rates and on plant growth of four commercial trees species(Pycnanthus angolensis,Terminalia superba,Mansonia altissima and Pterygota macrocarpa).We analyzed these parameters for seeds of three provenances(Daloa,Akoupéand Daoukro)of four species and for thirty plants aged 6 months per *** to begin germination and time to reach maximum germination were similar among species,and were not infl uenced by either treatment or *** seeds and those soaked for 24 and 48 h in water at room temperature yielded the highest germination rates,irrespective of species or *** one exception was ***,for which no germination was *** species,some provenances produced higher germination percentages than did *** clear relationship was computed between the germination rate and the morphometric characteristics of the seeds which varied signifi cantly between *** growth and morphological variability also depended greatly on *** factors might be implicated,therefore provenance trials should be undertaken and ***,molecular analysis should be undertaken to confi rm the implications of genetic factors and allow for genetic selection.

关键词： forest trees Seed germination Plant growth Provenance Cote d’Ivoire

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Lignin engineering in forest trees: From gene discovery to field trials

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Plant Communications 2022年第6期3卷 1-25页

作者： Barbara De Meester Ruben Vanholme Thatiane Mota Wout Boerjan Ghent University Department of Plant Biotechnology and BioinformaticsTechnologiepark 719052 GhentBelgium VIB Center for Plant Systems Biology Technologiepark 719052 GhentBelgium

Wood is an abundant and renewable feedstock for the production of pulp,fuels,and biobased ***,wood is recalcitrant toward deconstruction into cellulose and simple sugars,mainly because of the presence of lignin,an aromatic polymer that shields cell-wall ***,numerous research efforts have focused on engineering lignin amount and composition to improve wood ***,we focus on results that have been obtained by engineering the lignin biosynthesis and branching pathways in forest trees to reduce cell-wall recalcitrance,including the introduction of exotic lignin *** addition,we draw general conclusions from over 20 years of field trial research with trees engineered to produce less or altered *** discuss possible causes and solutions for the yield penalty that is often associated with lignin engineering in ***,we discuss how conventional and new breeding strategies can be combined to develop elite clones with desired lignin *** conclude this review with priorities for the development of commercially relevant lignin-engineered trees.

关键词： lignin genetic engineering breeding CRISPR field trial forest trees

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Anatomy of stem cuttings in relation to adventitious rooting of some forest trees

Anatomy of stem cuttings in relation to adventitious rooting...

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中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： Yahia Hamid Ali Elbasheer A/Wadoud A.Elkalifa forestry research Centre Siliviculture and management section-Soba Faculty of forestry and Range Science Sudan University of Science and Technology

Some old forest trees are classified as difficult-to-root due to presence of lignifications in internal stem tissue(sclerenchyma tissues) forming a continuous layer that surrounds primary phloem and the vascular bundles. This has been shown in stem cuttings of Eucalyptus microtheca,Acacia Senegal and Sterculia setigera old *** in some other trees these tissues are absent or present as a broken layer hence;they are classified as easy rooting *** phenomenon has been shown by cuttings from young and old *** trees;young age’s cuttings of Eucalyptus microtheca, Grewia tenax,and rejuvenated old trees ***,and Sterculia setigera young *** roots that appear in most cuttings with or without treatment with rooting hormones were found to be formed from tissues retaining capacity and stimulated to renewed division of cell in of primordia as was been shown by the transverse section of stem cuttings of E. microtheca.

关键词： root primordia adventitious rooting stem cuttings anatomy forest trees

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Photosynthetic and Growth Responses to Elevated [CO2] are Determined by Multiple forest Ecosystem Conditions

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Journal of Life Sciences 2014年第11期8卷 908-914页

作者： Titus Fondo Ambebe Department of Botany and Plant Physiology Faculty of Science University of Buea P. O. Box 63 Buea South West RegionCameroon

The responses of photosynthesis and growth of forest trees to rising atmospheric carbon dioxide concentration [CO2] are modified by ecosystem conditions. With the exception of a few, the vast majority of empirical studies on the impact of future high CO2 levels on forest trees have focused on [CO2] alone or in combination with an environmental factor. This paper uses the case of CO2 × nutrient and CO2 × nutrient-related interactions to evaluate the relative value of single or multiple ecosystem factors in determining the responses of photosynthesis and growth to elevated [CO2]. A comprehensive literature search was conducted with Google Scholar. The findings show a consensus among studies that CO2 and nutrient availability have synergistic effects on photosynthesis and growth. However, combinations of nutrient availability with temperature or moisture modify the CO2 effect in ways different from nutrient availability alone. To increase the predictive power of empirical studies, it is recommended that conclusions on the responses of forest trees to elevated atmospheric [CO2] be based on interactions with multiple, rather than single, ecosystem conditions.

关键词： CO2 elevation forest trees global change CO2 × environment interactions.

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Characterization of Sterculia setigera gum(gum karaya) in Sudan

Characterization of Sterculia setigera gum(gum karaya) in Su...

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中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： A/ Wadoud A.Elkhalifa El Fatih Ahmed Hassan Faculty of forestry and Range Sciences Sudan University of Science and Technology Faculty of Science Sudan University of Science and Technology

This study aimed to characterize Sterculia setigera gum(gum karaya ) obtained from different locations in *** samples were collected from E1 Nour forest,East Eldamazin City in the Blue Nile State,and from Rashad area(Gabal Alahmer and Um-Abdalla forest) in South Kordofan State during April,May and June *** physiochemical analysis of gum was carried out,and the estimated values of Blue Nile and Kordofan samples, respectively,were:moisture(12.5;13)%,ash(7.1;7.0)%,PH(4.8;4.7), nitrogen(0.08;0.08),protein(0,56;0.56)%,optical rotation(+3;+3), viscosity(720;690) ml/gm,equivalent weight(680;655) and uronic acid (27.3;29.6)%.Cationic composition was also *** composition of gum from Blue Nile State showed calcium to be the highest followed,in descending order,by magnesium,potassium,sodium,iron, manganese,cobalt,zinc and copper,whereas cationic concentration of gum samples from Kordofan State was in decreasing order;calcium,potassium, magnesium,sodium,iron,cobalt,manganese,zinc and *** Kordofan and Blue Nile gums gave identical FTIR spectra indicating that their detailed molecular structures are similar. The study suggests that more research work to be carried out on management of Sterculia setigera tree and on gum production technologies to enhance gum karaya production in Sudan.

关键词： forest trees Sterculia spp growth and development

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重庆市域主要树种抗旱性评价

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中国城市林业 2007年第4期5卷 36-38页

作者：潘伟王彦辉史东梅杜士才段健西南大学资源环境学院中国林业科学研究院森林生态环境与保护研究所重庆市林业局 4. 重庆市铁山坪林场

在重庆市江北区铁山坪森林公园对13个主要树种进行了调查,选择有代表性的10个样地,主要从树木的死亡率、落叶率并结合树叶的变色率和变形对树种抗旱性进行综合分析评价,得到结论:抗旱性强的树种为木荷;较强的树种依次为枫香、峨嵋紫楠(P... 详细信息

在重庆市江北区铁山坪森林公园对13个主要树种进行了调查,选择有代表性的10个样地,主要从树木的死亡率、落叶率并结合树叶的变色率和变形对树种抗旱性进行综合分析评价,得到结论:抗旱性强的树种为木荷;较强的树种依次为枫香、峨嵋紫楠(Phoebe sheareeni vomeiensis);中等的树种依次为石栎、野杏树(Prunus)、毛桐(Mallotus barbatus)、漆树、青皮(Schoepfia jasminodora)、香樟、杉木、马尾松;差的树种依次为槲栎(Quercus fabri hance)、毛叶木姜子(Litsea mollis)。

关键词： ChongQing forest trees Drought resistance Mortality Defoliation

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Phosphate solubilization potential of native rhizospheric microflora and their impact on growth of Madhuca latifolia(Mahua):An oil yielding medicinal plant of India

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Studies in Fungi 2018年第1期3卷 59-72页

作者： Mishra S Pany S Gupta N Plant Pathology and Microbiology Division Regional Plant Resource Centre BhubaneswarOdisha 751015 India

Madhuca latifolia is an economically important medicinal and oil yielding plant of India having slow growth *** microbial application to the rhizosphere of host plant are beneficial for growth and development of plants,a comprehensive experimental study by using native microflora of Madhuca latifolia had been carried out in the nursery *** and identification of native rhizospheric soil revealed the occurrence of 17 different types of bacteria(gram negative and positive)and 30 numbers of fungi belonging to myceloid type,Aspergillus,Alternaria,Colletotrichum,Fusarium and *** study was confined to phosphate solubilizing microbes for which solubilization potential(solubilization index and solubilization efficiency)was *** experiments in pot culture with red laterite soil were set in two experimental categories(1)non-transplanted and(2)*** grown under both the conditions with and without microbial application were maintained up to 120 days and final data recorded for morphological,physiological growth and as soil *** mineral solubilizing potential of native microbial strains has been *** inoculants were more effective than the bacterial inoculants as far as the growth and development of plants *** all,bacteria MLB-1,MLB-6,Aspergillus terreus and non-sporulating dematiaceous form of fungi were prominent in improving plant *** has also been confirmed the useful and beneficial impact of indigenous *** records made during the study is useful for development of bioinoculants for forest trees,nursery of quality planting material which will also helps in establishment at plantation site.

关键词： Bacteria bioinoculants forest trees fungi Madhuca latifolia phosphate solubilization

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