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Review of the application of in-situ sensing techniques to address the tea growth characteristics from leaf to field

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 1-11页

作者： Qiong Cao Chunjiang Zhao Ze Xu Ping Jiang Haibin Yang Xiangyu Meng Guijun Yang Information Technology Research Center Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China College of Machnical and Electrical Engineering Hunan Agricultural UniversityChangsha 410125China tea Research Institute of Chongqing Academy of Agricultural Sciences Chongqing 400000China

The tea plant is a valuable and evergreen crop that is extensively cultivated in China and many other countries.Currently,there is growing research interest in this plant.For the tea industry,it is crucial to develop rapid and non-invasive methods to evaluate tea plants in their natural environment.This article provides a comprehensive overview of non-invasive sensing techniques used for in-situ detection of tea plants.The topics covered include leaf,canopy,and field-level assessments,as well as statistical analysis techniques and characteristics specific to the research.Non-invasive testing technology is primarily used for monitoring and predicting tea pests and diseases,monitoring quality,and nutrients,determining tenderness and grade,identifying tea plant varieties,automatically detecting,and identifying tea buds,monitoring tea plant growth,and extracting tea garden areas through remote sensing.It also helps to evaluate planting suitability,assess disasters,and estimate yields.Additionally,the article examines the challenges and prospects of emerging techniques aimed at resolving the in-situ detection problem for tea plants.It can assist researchers and producers in comprehensively understanding the tea environment,quality characteristics,and growth process,thereby enhancing tea production quality,and fostering tea industry development.

关键词： non-destructive in-situ detection tea plants growth characteristics sensors

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Optimal flight parameters of unmanned helicopter for tea plantation frost protection

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International Journal of Agricultural and Biological Engineering 2015年第5期8卷 50-57页

作者： Hu Yongguang Liu Shengzhong Wu Wenye Wang Jizhang Shen Jianwen School of Agricultural Equipment Engineering Jiangsu UniversityZhenjiang 212013China Electronic Application Laboratory of Wuxi Hanhe Unmanned Helicopters Wuxi 214135China

To determine proper flight parameters of an unmanned helicopter for tea plantation frost protection,field experiments were conducted to study the impact of flight height,speed and interval on airflow disturbance and temperature rise around tea canopies based on the analysis and simulation of frost protection with a certain helicopter.The relationship between temperature rise after flight and the above flight parameters was established through a regression orthogonal experiment,based on which the optimal combination of flight parameters was obtained through the single-factor golden section method.The results showed that wind speed around tea canopies decreased with the increase of flight height when flight speed was constant.There was a multivariate linear relationship between temperature rise and flight parameters,and the sequence of flight parameters’influence on frost protection effect was flight interval,flight height,flight speed.The optimal combination of flight parameters were flight height of 4.0 m,flight speed of 6.0 m/s and flight interval of 20 min.After the flight with the above parameters air temperature around tea canopies increased 1.6℃ when background thermal inversion strength was 3.8℃.

关键词： thermal inversion frost protection unmanned helicopter flight parameters orthogonal experiment single-factor golden section method tea plants

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Pinoresinol-lariciresinol reductase with the conversion of pinoresinol to secoisolariciresinol directly from Camellia sinensis

Pinoresinol-lariciresinol reductase with the conversion of p...

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2016年全国植物生物学大会

作者： Yingling Wu Yanzhi Li Xinlong Dai Liping Gao Tao Xia State Key Laboratory of tea Plant Biology and Utilization Anhui Agricultural University

(+)-Pinoresinol/(+)-lariciresinol reductase has been reported for the first time that it can catalyze the sequential reduction of(+)-pinoresinol into(-)-secoisolariciresinol via(+)-laririciresinol in Forsythia intermedia. The intermediacy of lariciresinol in secoisolariciresinol biosynthesis was also clarified in Lp PLR,Lu PLR and La PLR. However,the biosynthesis of lignan is still remained uncomplete. In this study,we have cloned two PLRs from tea plants,named CsPLR1 and CsPLR2. The c DNAs are 1325 bp and 1126 bp,respectively,and both of them contain an ORF of 936 bp encoding 312 amino acids. It was noteworthy that there was a huge difference between CsPLR1 and CsPLR2 or even PLRs in other species through enzymatic analysis in vitro. when(+)/(-)-pinoresinol and racemic lariciresinol were used as substrate,CsPLR2 could convert lariciresinol into secoisolariciresinol,while CsPLR1 barely carried out this reduction step,but a significant conversion of pinoresinol into secoisolariciresinol was observed. Moreover,the time course of CsPLR1 demonstrated that there was no correlation between the depletion of lariciresinol and the formation of secoisolariciresinol. So,the possible biosynthetic routes may be elucidated as follows: CsPLR2 could convert(+)-pinoresinol enantioselectively into secoisolariciresinol through lariciresinol,while CsPLR1 reduced both(+)/(-)-pinoresinol to lariciresinol and secoisolariciresinol immediately,but lariciresinol not acted as an intermediate or optimal substrate. Taken together,these results showed that the formation of secoisolariciresinol could be independent of the catalyzation of lariciresinol. This study shed light on the biosynthesis of lignan,but the mechanism needs further study.

关键词： pinoresinol-lariciresinol reductase tea plants biosynthetic routes

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Unravelling Pestalotiopsis-like species associated with Camellia sinensis in China

Unravelling Pestalotiopsis-like species associated with Came...

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中国菌物学会2016年学术年会

作者： Fang Liu Mubashar Raza Lingwei Hou Lei Cai Chinese Academy of Sciences Institute of MicrobiologyState Key Laboratory of Mycology University of Chinese Academy of Sciences

A total of 114 Pestalotiopsis-like isolates associated with symptomatic and asymptomatic tissues of Camellia sinensis were investigated from eight provinces in China（Fujian,Guangxi,Guizhou,Jiangxi,Sichuan,Tibet,Yunnan,Zhejiang）.Based on single-locus and multi-locus（LSU,ITS,TEF1,TUB2） phylogenetic analyses and coalescent-based species delimitation methods（GMYC and PTP）,as well as the comparison of morphological,host-association and geographical characters,they were classified into three genera,i.e.Neopestalotiopsis,Pestalotiopsis and Pseudopestalotiopsis,and at least 17 species,including eight novel species in Pestalotiopsis and two novel species in Pseudopestalotiopsis.Moreover,six clades representing previously unknown lineages were determined as unclassifed species due to the representative of single strain or their sterility.Our multi-locus phylogenetic analysis suggested that the currently widely used loci do not consistently provide stable and high resolution tree topologies.A few more phylogeneticaly highly informative loci and larger sampling size are therefore necessary to be incorporated in future study to infer a more satisfactorily resolved topology,as well as species relationships.

关键词： Coalescent theory Phylogeny Species delimitation tea plants

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