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Stress Biology 2023年第1期3卷 468-476页

作者： Johannes Heinze Luise Werger Michael Ogden Thilo Heinken rainer hoefgen Ewald Weber Institute of Biochemistry and Biology Biodiversity Research and Systematic BotanyUniversity of PotsdamMaulbeerallee 1Potsdam 14469Germany Heinz Sielmann Foundation Dyrotzer Ring 4Wustermark(OT Elstal)14641Germany Department of Molecular Physiology Max Planck Institute of Molecular Plant PhysiologyAm Mühlenberg 1Potsdam-Golm 14476Germany School of Biosciences University of MelbourneMelbourneVIC 3010Australia Institute of Biochemistry and Biology General BotanyUniversity of PotsdamMaulbeerallee 3Potsdam 14469Germany

Wind is an environmental stimulus that stresses plants of all growth forms at all life-stages by influencing the development,architecture,and morphology of roots and ***,comparative studies are scarce and no study directly investigated whether shoot and root morphological traits of trees,grasses and forbs differ in their response to short wind pulses of different wind *** this study,we found that across species,wind stress by short wind pulses of increasing intensity consistently changed root morphology,but did not affect shoot morphological traits,except plant height in four *** effects in roots were generally weak in tree species but consistent across growth ***,plant height of species was correlated with changes in specific root length and average *** results indicate that short-pulse wind treatments affect root morphology more than shoot morphology across growth *** further suggest that wind stress possibly promotes root anchorage in young plants and that these effects might depend on plant height.

关键词： Wind stress Leaf traits Root traits Growth form Morphology

General Regulatory Patterns of Plant Mineral Nutrient Depletion as Revealed by serat Quadruple Mutants Disturbed in Cysteine Synthesis

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Molecular Plant 2010年第2期3卷 438-466页

作者： Mutsumi Watanabe Hans-Michael Hubberten Kazuki Saito rainer hoefgen Graduate School of Pharmaceutical Sciences Chiba University 1-33 Yayoi-cho Inage-ku Chiba 263-8522 Japan Max-Planck-lnstitut fuer Molekulare Pflanzenphysiologie Wissenschaftspark Golm Am Muehlenberg 1 14476 Potsdam-Golm RIKEN Plant Science Center Tsurumi-ku Yokohama 230-0045 Japan

Sulfate is an essential macronutrient for plants. Plants have developed strategies to cope with sulfate deficiency, and other nutrient ion limitations. However, the regulation of these adaptive responses and the coordinating signals that underlie them are still poorly characterized. O-acetylserine （OAS） is a marker metabolite of sulfate starvation and has been speculated to have a signaling function. OAS is synthesized by the enzyme serine acetyltransferase （SERAT）, which is encoded by five distinct genes in Arabidopsis. We investigated quadruple knockout mutants of SERAT that retained only one functional isoform. These mutants displayed symptoms of sulfate starvation. Furthermore, some of them displayed phenotypes typical of prolonged sulfate starvation, in particular, developmental programs associated with senescence or stress responses. Thus, we compared metabolite and transcriptome data from these mutants with N-, P-, K-, and S-depleted plants. This revealed many similarities with general nutrient-depletion-induced senescence （NuDIS）, in- dicating the recruitment of existing regulatory programs for nutrient-starvation responses. Several candidate genes that could be involved in these processes were identified, including transcription factors and other regulatory proteins, as well as the functional categories of their target genes. These results outline components of the regulatory network controlling plant development under sulfate stress, forming a basis for further investigations to elucidate the complete network. In turn, this will advance our broader understanding of plant responses to a range of other nutrient stresses.

关键词： Abiotic/environmental stress ion/metabolite sensing senescence functional genomics Arabidopsis sulfur.

Non-aqueous fractionation revealed changing subcellular metabolite distribution during apple fruit development

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Horticulture Research 2019年第1期6卷 556-567页

作者： Wasiye F.Beshir Takayuki Tohge Mutsumi Watanabe Maarten L.A.TMHertog rainer hoefgen Alisdair R.Fernie Bart M.Nicolaï Division of Mechatronics Biostatistics and Sensors(MeBioS)Department of Biosystems(BIOSYST)KU LeuvenLeuvenBelgium Max Planck Institute of Molecular Plant Physiology(MPI-MP) Potsdam-GolmGermany Flanders Centre of Postharvest Technology(VCBT) LeuvenBelgium

In developing apple fruit,metabolic compartmentation is poorly understood due to the lack of experimental *** subcellular compartments in fruit using non-aqueous fractionation has been technically difficult due to the excess amount of sugars present in the different subcellular compartments limiting the resolution of the *** work described in this study represents the first attempt to apply non-aqueous fractionation to developing apple fruit,covering the major events occurring during fruit development(cell division,cell expansion,and maturation).Here we describe the non-aqueous fractionation method to study the subcellular compartmentation of metabolites during apple fruit development considering three main cellular compartments(cytosol,plastids,and vacuole).Evidence is presented that most of the sugars and organic acids were predominantly located in the vacuole,whereas some of the amino acids were distributed between the cytosol and the *** results showed a shift in the plastid marker from the lightest fractions in the early growth stage to the dense fractions in the later fruit growth *** implies that the accumulation of starch content with progressing fruit development substantially influenced the distribution of plastidial fragments within the non-aqueous density gradient *** from this study provide substantial baseline information on assessing the subcellular compartmentation of metabolites in apple fruit in general and during fruit growth in particular.

关键词： technique distribution sugar

SALT-RESPONSIVE ERF1 Is a Negative Regulatorof Grain Filling and Gibberellin-MediatedSeedling Establishment in Rice

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Molecular Plant 2014年第2期7卷 404-421页

作者： Romy Schmidt[a][b] Jos H.M. Schippers[a][b] Delphine Mieulet[c] Mutsumi Watanabe[b] rainer hoefgen[b] Emmanuel Guiderdoni[c] Bernd Mueller-Roeber[a][b] [a] Institute of Biochemistry and Biology University of Potsdam Karl-Liebknecht-Str. 24–25 14476 Potsdam Germany [b] Max Planck Institute of Molecular Plant Physiology Am Mühlenberg 1 14476 Potsdam Germany [c] CIRAD UMR AGAP Avenue Agropolis 34398 Montpellier Cedex 5 France

Grain quality is an important agricultural trait that is mainly determined by grain size and ***, we characterize the role of the rice transcription factor （TF） SALT-RESPONSIVE ERF1 （SERF1） during grain develop-ment. Through genome-wide expression profiling and chromatin immunoprecipitation, we found that SERF1 directlyregulates RICE PROLAMIN-BOX BINDING FACTOR （RPBF）, a TF that functions as a positive regulator of grain filling. Lossof SERF1 enhances RPBF expression resulting in larger grains with increased starch content, while SERF1 overexpressionrepresses RPBF resulting in smaller grains. Consistently, during grain filling, starch biosynthesis genes such as GRANULE-BOUND STARCH SYNTHASEI （GBSSI）, STARCH SYNTHASEI （SSI）, SSIIla, and ADP-GLUCOSE PYROPHOSPHORYLASELARGE SUBUNIT2 （AGPL2） are up-regulated in SERF1 knockout grains. Moreover, SERF1 is a direct upstream regulator ofGBSSI. In addition, SERF1 negatively regulates germination by controlling RPBF expression, which mediates the gibberel-lic acid （GA）-induced expression of RICE AMYLASEIA （RAmylA）. Loss of SERF1 results in more rapid seedling establish-ment, while SERF1 overexpression has the opposite effect. Our study reveals that SERF1 represents a negative regulatorof grain filling and seedling establishment by timing the expression of RPBF.

关键词： RPBF rice grain filling germination SERF1 gibberellic acid