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The processes on graft union formation in tomato
Jingwei Fan,Rui Yang,Xiaoman Li,Wenchao Zhao,Fukuan Zhao,Shaohui Wang 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.5
Despite the long and widespread use of grafting in tomato cultivation, the structural changes that occur at the graft union during the early stages of the union remain poorly understood. In this study, the structural development of the graft union in tomato plants was examined 3, 5, 8, 11 and 14 days after grafting (DAG) using scanning electron microscopy (SEM) and a paraffin sectioning technique. The paraffin-sectioned images of the transection revealed that parenchymal cells from the graft union divided and proliferated in most combinations, and these cells could be detected at various stages of development. The SEM images of the scion and rootstock longitudinal sections showed that many interconnecting structures appeared at 8 DAG and were followed by a vascular rearrangement that did not connect the scion and rootstock. Vascular bundle bridges appeared at 11 DAG and connected the scion and rootstock. The connection of graft union between rootstock and scion is influenced by the plant growth condition. In our managed environment, period for formation of the connection structure formation between the rootstock and scion was 7-14 days after grafting.
Ravi Muchakayala,Shenhua Song,Jingwei Wang,Youhua Fan,Manjunatha Bengeppagari,Jianjun Chen,Manlin Tan 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-
A new gel polymer electrolyte based on 1-methyl-1-propylpyrrolidinium bis(trifluoromethyl sulfonyl)imide ([PMpyr][NTf2]) entrapped in poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) is prepared and optimized for flexible solid state supercapacitor applications. The structural, thermal, electrical and electrochemical properties of the ionic liquid gel polymer electrolyte membranes are studied by different characterization techniques. The transparent gel polymer electrolyte membranes exhibit high amorphicity and excellent thermal stability. The 20PVdF-HFP:80[PMpyr][NTf2] gel polymer electrolyte membrane possesses a high ionic conductivity (1.596 × 10−3 S cm−1) and wide electrochemical stability window (4.7 V) at room temperature. It is used as the electrolyte material for the fabrication of flexible electric double layer supercapacitors (EDLCs) with multiwalled carbon nanotube (MWCNT)-added and unadded activated carbon (AC) electrodes. The performances of flexible EDLCs are evaluated using cyclic voltammetry and galvanostatic charge–discharge measurements. The EDLC with MWCNT-added AC electrodes exhibits apparently higher specific capacitance of electrode (156.64 F g−1), specific energy (30.69 Wh kg−1) and specific power (4.13 kW kg−1) than that with AC electrodes. The cyclic stability of the former is still in a good condition at the 2000th charge–discharge cycle and much better than the latter. The present comparative study indicates that the 20PVdF-HFP:80[PMpyr][NTf2] gel polymer electrolyte is a good candidate for the development of flexible solid-state supercapacitors.
Canli Hu,Wenchao Zhao,Jingwei Fan,Zilong Li,Rui Yang,Fukuan Zhao,JianLi Wang,Shaohui Wang 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.4
Root-knot nematodes (RKNs; Meloidogyne spp.) are obligate endoparasites that infect a large number of crop plants and cause severe yield losses. Tomato cultivars carrying the Mi-1 gene conferring root-knot nematode resistance have been widely used, but this gene loses its effectiveness at soil temperatures above 28°C. In this study, the mechanism of the loss of resistance to RKNs at high soil temperatures was examined using LA0655 (Solanum lycopersicum cv. Anahu), which contains the Mi-1 gene. It was found that high soil temperatures delayed the expression of the Mi-1 gene and reduced the activities of superoxide dismutase, peroxidase, chitinase, and β-1,3-glucanase. Although genes in the jasmonic acid (JA) pathway exhibited an obvious response at high soil temperatures, this response could not prevent the invasion of RKNs; indeed, at 30 days after inoculation with RKNs, the plants produced large numbers of root knots and egg masses at a soil temperature of 32°C.
Ruilian Xiu,Jie Jia,Qing Zhang,Fengjiao Liu,Yaxin Jia,Yuanyuan Zhang,Beibei Song,Xiaodan Liu,Jingwei Chen,Dongyang Huang,Fan Zhang,Juanjuan Ma,Honglin Li,Xuan Zhang,Yunyun Geng 대한약리학회 2023 The Korean Journal of Physiology & Pharmacology Vol.27 No.6
Transmembrane protein TMEM16A, which encodes calcium-activated chloride channel has been implicated in tumorigenesis. Overexpression of TMEM16A is associated with poor prognosis and low overall survival in multiple cancers including lung adenocarcinoma, making it a promising biomarker and therapeutic target. In this study, three structure-related sesquiterpene lactones (mecheliolide, costunolide and dehydrocostus lactone) were extracted from the traditional Chinese medicine Aucklandiae Radix and identified as novel TMEM16A inhibitors with comparable inhibitory effects. Their effects on the proliferation and migration of lung adenocarcinoma cells were examined. Whole-cell patch clamp experiments showed that these sesquiterpene lactones potently inhibited recombinant TMEM16A currents in a concentration- dependent manner. The half-maximal concentration (IC50) values for three tested sesquiterpene lactones were 29.9 ± 1.1 μM, 19.7 ± 0.4 μM, and 24.5 ± 2.1 μM, while the maximal effect (Emax) values were 100.0% ± 2.8%, 85.8% ± 0.9%, and 88.3% ± 4.6%, respectively. These sesquiterpene lactones also significantly inhibited the endogenous TMEM16A currents and proliferation, and migration of LA795 lung cancer cells. These results demonstrate that mecheliolide, costunolide and dehydrocostus lactone are novel TMEM16A inhibitors and potential candidates for lung adenocarcinoma therapy.