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lignin-phenol monomers govern the pyrolytic conversion of natural biomass from lignocellulose to products

Environmental Science and Ecotechnology 2021年第4期8卷 110-118页

作者： Hualing Hu Wenbing Tan Beidou Xi State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental SciencesBeijing100012China

The effect of the interaction between lignin-phenol monomers and holocellulose in natural biomass on the distribution of pyrolysis products remains *** results of this study showed that the interaction between lignin and holocellulose during the pyrolysis of natural biomass became more pronounced as the pyrolysis temperature *** interaction between lignin and holocellulose in the natural crosslinked structure promoted the generation of CO and inhibited the generation of CO2 at 750*** inhibited the decarboxylic reaction of hemicellulose during pyrolysis but was important for the generation of levoglucosan during cellulose *** slowed the demethoxyreaction of lignin guaiacol but promoted the removal of aliphatic hydrocarbon substituents from the aromatic *** cinnamyl phenol monomers of lignin increased the rates of change of biomass pyrolysis products with the lignin mass fraction at 400***,when the pyrolysis temperature increased to 750C,all types of lignin phenol monomers increased the rates of change of the biomass pyrolysis *** results provide new insights that have implications for the development of pyrolysis techniques for the resource recycling of various types of biomass for the preparation of high-grade gaseous and liquid fuels.

关键词： Natural biomass Pyrolysis lignin monomers Holocellulose Original interaction

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VAMP726 from maize and Arabidopsis confers pollen resistance to heat and UV radiation by influencing lignin content of sporopollenin

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Plant Communications 2023年第6期4卷 163-178页

作者： Wenqi Yang Dongdong Yao Haiyang Duan Junli Zhang Yaling Cai Chen Lan Bing Zhao Yong Mei Yan Zheng Erbing Yang Xiaoduo Lu Xuehai Zhang Jihua Tang Ke Yu Xuebin Zhang State Key Laboratory of Crop Stress Adaptation and Improvement Henan Joint International Laboratory for Crop Multi-Omics ResearchSchool of Life SciencesHenan UniversityKaifeng 475004China National Key Laboratory of Wheat and Maize Crop Science College of AgronomyHenan Agricultural UniversityZhengzhou 450002China The Shennong Laboratory Zhengzhou 450002China College of Chemistry Zhengzhou UniversityZhengzhou 450001China National Engineering Laboratory of Crop Stress Resistance School of Life ScienceAnhui Agricultural UniversityHefei 230036China

Sporopollenin in the pollen cell wall protects male gametophytes from *** derivatives,including guaiacyl(G)lignin units,are known to be structural components of sporopollenin,but the exact composition of sporopollenin remains to be fully *** analyzed the phenylpropanoid derivatives in sporopollenin from maize and Arabidopsis by thioacidolysis coupled with nuclear magnetic resonance(NMR)and gas chromatography–mass spectrometry(GC–MS).The NMR and GC–MS results confirmed the presence of p-hydroxyphenyl(H),G,and syringyl(S)lignin units in sporopollenin from maize and ***,H units account for the majority of lignin monomers in sporopollenin from these *** next performed a genome-wide association study to explore the genetic basis of maize sporopollenin composition and identified a vesicle-associated membrane protein(ZmVAMP726)that is strongly associated with lignin monomer composition of maize *** manipulation of VAMP726 affected not only lignin monomer composition in sporopollenin but also pollen resistance to heat and UV radiation in maize and Arabidopsis,indicating that VAMP726 is functionally conserved in monocot and dicot *** work provides new insight into the lignin monomers that serve as structural components of sporopollenin and characterizes VAMP726,which affects sporopollenin composition and stress resistance in pollen.

关键词： pollen cell wall sporopollenin lignin monomers heat stress UV radiation

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