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Selective special concentration and allelopathic effects of Plant hormone Indole-3-acetic on growth promotion of marine photosynthetic bacteria

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Selective special concentration and allelopathic effects of ...

Mitogen-activated protein kinase cascades in plant signaling

中国第四届植物化感作用学术研讨会

作者： XIUHAI WANG LANSHENG LI YING LIU Key Lab of Marine Environmental Science and Ecology(Ministry of Education)Ocean University of China

We studied the effects of Indole-3-acetic(plant growth hormone)on the growth of photosynthetic bacteria(PSB).Indole-3-acetic promoted the growth of PSB at an optimal concentration of 1.0 mg/L.In the presence of Indole-3-acetic,a deferred logarithmic growth phase appeared.At the optimal concentration 1.0 mg/L in 0-5days,the slopes of the treated samples were 0.1121,0.1042,0.1208 and 0.0926 AU/day respectively,while the slope of the control sample was 0.1023 AU/day.The OD660nm results representing growth promotion of PSB were statistically analyzed with SPSS:the treated samples were specially compared with control sample at the concentration 1.0 mg/L,and obviously the treated sample were higher than the control sample(P<0.05).In the deferred logarithmic growth phase(5-13 days),especially at the optimal concentration 0.1 mg/L(571.4 nmol/1), the slopes of the treated samples were 0.5928,0.3629,0.4851 and 0.4937 AU/day respectively,while the slope of the control sample was 0.4947AU/day.The OD660nm results of promoting the growth of PSB were also statistically analyzed with SPSS:the treated sample were specially compare with control sample at the optimal concentration 0.1 mg/L,and obviously the treated sample were still higher than the control sample(P<0.01).Therefore,there was a significant growth promotion effect,a vivid phenomenon of allelopathic effect.The most significant growth promotion concentration is a selective special concentration,and the effect is named the selective special concentration allelopathic effect.This is first report on the allelopathic effects of Indole-3-acetic on growth promotion of PSB.

关键词： Plant hormone Indole-3-acetic selective special concentration selective special concentration allelopathic effect Photosynthetic Bacterium promotion culture promotion efficiency nanomolar.

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Journal of Integrative plant Biology 2022年第2期64卷 301-341页

作者： Mengmeng Zhang Shuqun Zhang The Key Laboratory of plant Immunity College of Plant ProtectionNanjing Agricultural UniversityNanjing210095 China Division of Biochemistry University of MissouriColumbiaMO65211 USA

Mitogen-activated protein kinase(MAPK)cascades are key signaling modules downstream of receptors/sensors that perceive either endogenously produced stimuli such as peptide ligands and damage-associated molecular patterns(DAMPs)or exogenously originated stimuli such as pathogen/microbe-associated molecular patterns(P/MAMPs),pathogen-derived effectors,and environmental factors.In this review,we provide a historic view of plant MAPK research and summarize recent advances in the establishment of MAPK cascades as essential components in plant immunity,response to environmental stresses,and normal growth and development.Each tier of the MAPK cascades is encoded by a small gene family,and multi ple members can function redundantly in an MAPK cascade.Yet,they carry out a diverse array of biological functions in plants.How the signaling specificity is achieved has become an interesting topic of MAPK research.Future investigations into the molecular mechanism(s)underlying the regulation of MAPK activation including the activation kinetics and magnitude in response to a stimulus,the spatiotemporal expression patterns of all the components in the signaling pathway,and functional characterization of novel MAPK substrates are central to our understanding of MAPK functions and signaling specificity in plants.

关键词： abiotic stress ligand-receptor interaction mitogenactivated protein kinase MAPK substrate plant growth and development Plant hormone plant immunity receptor-like protein kinase signal transduction

Exogenous SA or 6-BA maintains photosynthetic activity in maize leaves under high temperature stress

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The Crop Journal 2023年第2期11卷 605-617页

作者： Yuting Li Xuetao Han Hao Ren Bin Zhao Jiwang Zhang Baizhao Ren Huiyuan Gao Peng Liu College of Agronomy Shandong Agricultural UniversityTai’an 271018ShandongChina College of Life Science Shandong Agricultural UniversityTai’an 271018ShandongChina

With global warming, high-temperature(HT) stress has become a major abiotic stress for crops, in particular summer maize in China. Photosynthesis is sensitive to HT. Salicylic acid(SA) and 6-benzyladenine(6-BA) can improve the adaptation of plants to various biotic and abiotic stresses. However, their contribution to maintaining photosynthetic activity and alleviating photoinhibition in maize leaves under HT stress is still unclear. The effects of exogenous SA or 6-BA on growth, photosynthesis capacity, photosystem Ⅱ(PSII) activity, subcellular ultrastructure, antioxidant system, and Plant hormones in maize leaves under HT stress were investigated. Under HT conditions, application of SA or 6-BA up-regulated gibberellin and zeatin content in leaves, increasing leaf area index(LAI). It also expanded the stomata by reducing abscisic acid and jasmonic acid content in leaves, cooling them and increasing CO2supply to photosynthesis. A higher net photosynthetic rate, combined with increased activity of the antioxidant system, alleviated oxidative stress in maize plants sprayed with SA or 6-BA, allowing them to maintain their chloroplast ultrastructure and PSII activity, in particular electron transfer from QAto QB. The increased LAI and net photosynthetic rate per unit leaf area also resulted in the accumulation of more biomass.

关键词： Maize Photosynthesis Plant hormone Antioxidant enzymes Photosystem II

Defensive Role of Plant hormones in Advancing Abiotic Stress-Resistant Rice plants

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Rice science 2023年第1期30卷 15-35页

作者： M.Iqbal R.KHAN Sarika KUMARI Faroza NAZIR Risheek Rahul KHANNA Ravi GUPTA Himanshu CHHILLAR Department of Botany Jamia HamdardNew Delhi 110062India College of General Education Kookmin UniversitySeoul 136702South Korea

Consistent climatic perturbations have increased global environmental concerns, especially the impacts of abiotic stresses on crop productivity. Rice is a staple food crop for the majority of the world’s population. Abiotic stresses, including salt, drought, heat, cold and heavy metals, are potential inhibitors of rice growth and yield. Abiotic stresses elicit various acclimation responses that facilitate in stress mitigation. Plant hormones play an important role in mediating the growth and development of rice plants under optimal and stressful environments by activating a multitude of signalling cascades to elicit the rice plant’s adaptive responses. The current review describes the role of Plant hormone-mediated abiotic stress tolerance in rice, potential crosstalk between Plant hormones involved in rice abiotic stress tolerance and significant advancements in biotechnological initiatives including genetic engineering approach to provide a step forward in making rice resistance to abiotic stress.

关键词： abiotic stress genetic engineering Plant hormone rice transcription factor tolerance

Plant hormone Resistance and Agronomic Characteristics of the MT10 Mutant in Rice

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Journal of Northeast Agricultural University(English Edition) 2000年第2期7卷 130-135页

作者： HAOZai－bin YANGLiang－qun 等 NortheastAgricultureUniversity HarbinHeilongJiang150030 ShandongAcademyofAgricultureScienceJiningRice

The MT10 mutant plants had resistances to auxin.Under light and dark culture,the roots of MT10 seedlings had shown less lateral roots and short lateral roots.In soil,MT10 seedlings had shown not only no changed agrono... 详细信息

关键词： mutant lateral root morphology Plant hormone agronomic characteristics

Origin, evolution, and molecular function of DELLA proteins in plants

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The Crop Journal 2022年第2期10卷 287-299页

作者： Huidan Xue Xiang Gao Peng He Guanghui Xiao College of Life Sciences Shaanxi Normal UniversityXi’an 710119ShaanxiChina School of Food and Biological Engineering Shaanxi University of Science and TechnologyXi’an 710021ShaanxiChina School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710012ShaanxiChina

Gibberellic acid(GA), a ubiquitous phytohormone, has various effects on regulators of plant growth and development. GAs promote growth by overcoming growth restraint mediated by DELLA proteins(DELLAs). DELLAs, in the GRAS family of plant-specific nuclear proteins, are nuclear transcriptional regulators harboring a unique N-terminal GA perception region for binding the GA receptor GIBBERELLIN INSENSITIVE DWARF1(GID1) and a C-terminal GRAS domain necessary for GA repression activity via interaction with multiple regulatory proteins. The N-terminal conserved region of DELLAs evolved to form a mode of GID1/DELLA-mediated GA signaling originating in bryophytes and ferns. Binding of GA to GID1 increases the affinity between DELLAs and a SCF E3 ubiquitin–ligase complex, thus promoting the eventual destruction of DELLAs by the 26 S proteasome. DELLAs negatively regulate GA response by releasing transcription factors to directly activate downstream genes and indirectly regulate GA biosynthesis genes increasing GA responsiveness and feedback control by promoting GID1 transcription. GA communicates extensively with other Plant hormones and uses crosstalk to regulate plant growth and development. In this review, we summarize current understanding of evolutionary DELLA-mediated gibberellin signaling and functional diversification of DELLA, focusing primarily on interactions of DELLAs with diverse phytohormones.

关键词： DELLA proteins GA signaling pathway Cross-talk Plant hormone Growth and development

Transcriptome analysis reveals effects of red and blue lightemitting diodes(LEDs)on the growth,chlorophyll fluorescence and endogenous Plant hormones of potato(Solanum tuberosum L.)plantlets cultured in vitro

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Journal of Integrative Agriculture 2021年第11期20卷 2914-2931页

作者： CHEN Li-li WANG Hao-ying GONG Xiao-chen ZENG Zhao-hai XUE Xu-zhang HU Yue-gao College of Science&Technology Ningbo UniversityCixi 315300P.R.China College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193P.R.China Beijing Research Center for Intelligent Equipment in Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China

Red and blue light illumination has been reported to significantly affect plantlet growth.Potato is an important food and feed crop in the world and potato plantlet cultured in vitro plays an important role in potato production.However,few studies have documented the effects of red and blue light on the growth of potato plantlets revealed at the transcriptome level.The objective of this study was to determine the growth and physiological responses of potato plantlets cultured in vitro under monochromatic red(RR),monochromatic blue(BB)as well as combined red and blue(RB)LEDs using the RNA-Seq technique.In total,3150 and 814 differentially expressed genes(DEGs)were detected in potato plantlets under RR and BB,respectively,compared to RB(used as control).Compared to the control,the DEGs enriched in"photosynthesis"and"photosynthesis-antenna proteins"metabolic pathways were up-regulated and down-regulated by BB and RR,respectively,which might be responsible for the increases and decreases of maximum quantum yield(F_(v)/F_(m)),photochemical quantum yield(φ_(PSII)),photochemical quenching(q_(P))and electron transfer rate(ETR)in BB and RR,respectively.Potato plantlets exhibited dwarfed stems and extended leaves under BB,whereas elongated stems and small leaves were induced under RR.These dramatically altered plantlet phenotypes were associated with variable levels of endogenous Plant hormones gibberellin(GAs),indoleacetic acid(IAA)and cytokinins(CKs),as assessed in stems and leaves of potato plantlets.In addition,monochromatic red and blue LEDs trigged the opposite expression profiles of DEGs identified in the"Plant hormone signal transduction"metabolic pathway,which were closely related to the endogenous Plant hormone levels in potato plantlets.Our results provide insights into the responses of potato plantlets cultured in vitro to red and blue LEDs at the transcriptomic level and may contribute to improvements in the micro-propagation of potato plantlets cultured in vitro from the light spectrum aspect.

关键词： potato(Solanum tuberosum L.)plantlets in vitro red/blue LEDs light sources RNA-seq chlorophyll fluorescence Plant hormone

3-Hydroxycarlactone, a Novel Product of the Strigolactone Biosynthesis Core Pathway

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Molecular plant 2018年第10期11卷 1312-1314页

作者： Lina Baz Narumi Mori Jianinq Mi Muhammad Jamil Boubacar A. Kountche Xiujie Guo Aparna Balakrishna Kun-Peng Jia Martina Vermathen Kohki Akiyama Salim AI-Babili King Abdullah University of Science and Technology (KAUST) Biological and Environmental Sciences and Engineering Division The BioActives Lab Thuwal 23955-6900 Kingdom of Saudi Arabia Graduate School of Life and Environmental Sciences Osaka Prefecture University 1-1 Gakuen-cho Nakaku Sakai Osaka 599-8531 Japan Department of Chemistry & Biochemistry University of Berne Berne Switzerland

Dear Editor,Strigolactones （SLs） are a class of carotenoid-derived plant hor-mones that regulate shoot branching among other developmental processes （Gomez-Roldan et al., 2008; Umehara et al., 2008; AI-Babili and Bouwmeester, 2015）. In addition, SLs are released by roots as a chemical signal attracting symbiotic arbuscular mycorrhizal fungi. However, this signal is also perceived by seeds of root parasitic weeds, announcing the presence of a host and triggering germination （AI-Babili and Bouwmeester, 2015）. Natural SLs consist of a butenolide ring （D ring） connected by an enol ether bridge to a tricyclic lactone （ABC rings） in canonical SLs, such as strigol, and to a variable, second moiety in non-canonical SLs, such as methyl carlactonoate.

关键词： Plant hormone CARLACTONE INHIBITION

RNA-Seq Study Reveals AP2-Domain-Containing Signalling Regulators Involved in Initial Imbibition of Seed Germination in Rice

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Rice science 2020年第4期27卷 302-314页

作者： HE Yongqi ZHAO Jia FENG Defeng HUANG Zhibo LIANG Jiaming ZHENG Yufei CHENG Jinping YING Jifeng WANG Zhoufei Laboratory of Seed Science and Technology/Guangdong Key Laboratory of plant Molecular Breeding/State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources South China Agricultural UniversityGuangzhou 510642China Laboratory of Seed Science and Technology State Key Laboratory of Crop Genetics and Germplasm EnhancementJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjing 210095China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China

A number of internal signals are required for seed germination.However,the precise signalling responses in the initial imbibition of seed germination are not yet fully understood in rice.In this study,the RNA sequencing(RNA-Seq)approach was conducted in 8 h imbibed seeds to understand the signalling responses in the initial imbibition of rice seed germination.A total of 563 differentially expressed genes(DEGs)with at least 4-fold change were identified in 8 h imbibed seeds compared to dry seeds.MapMan analysis revealed that the majority of signalling response-related DEGs were hormone-and transcription factor-related genes,in which the largest number of DEGs belong to the AP2-domain-containing regulators,and their expressions were significantly induced in the initial imbibition of seed germination in rice.Moreover,at least five AP2-domain-containing transcription factor OsDREBs were identified in the initial imbibition of rice seed germination,and the expressions of 251 DEGs were putatively regulated by OsDREBs through the dehydration-responsive element(DRE)cis-element assay.It suggested that the OsDREBs might play important roles in the regulation of initial seed imbibition in rice.The identified genes provide a valuable resource to study the signalling regulation of seed germination in the future.

关键词： rice seed imbibition signalling response Plant hormone transcription factor RNA-sequencing