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  • Open Access


    Amylose Content, Morphology, Crystal Structure, and Thermal Properties of Starch Grains in Main and Ratoon Rice Crops

    Na Kuang, Huabin Zheng, Qiyuan Tang*, Yuanwei Chen, Xiaomin Wang, Youyi Luo

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.014637

    Abstract Rice ratooning, or the production of a second rice crop from stubble after the harvest of the main crop, is considered to be a green and resource-efficient rice production system. The present study was conducted to examine variance in amylose content (AC), grain morphology, crystal structure, and thermal properties of starch between main- and ratoon-season rice of seven varieties. Ratoon-season rice grains had higher ACs and significantly lower transition gelatinization temperatures (To, Tp, and Tc) than did main-season rice grains. The relative crystallinity and lamellar peak intensity of ratoon-season rice starch were 7.89% and 20.38% lower, respectively, than those of… More >

  • Open Access


    Effects of Different Vermicompost Rates on Growth, 2-Acetyl-1-Pyrroline, Photosynthesis and Antioxidant Responses of Fragrant Rice (Oryza sativa L.) Seedling

    Shaoyi Ruan1,2,3,#, Haowen Luo1,2,3,#, Xiaoyan Zeng1,2,3,#, Runhao Wen1,2,3, Feida Wu1,2,3, Xiangru Tang1,2.*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.015610

    Abstract Vermicompost is an organic fertilizer contains multiple nutrient elements. However, the application of vermicompost in fragrant rice production is rarely reported. In order to study the effects of vermicompost application on fragrant rice (Oryza sativa L.) seedling performances, present study was conducted with two fragrant rice cultivars and four vermicompost rate treatments (0 (CK), 2.5 (Wo1), 5.0 (Wo2) and 10.0 (Wo3) g kg−1 ). The results showed that vermicompost treatments significantly increased dry weight of fragrant rice seedling by 8.31–32.56% compared with CK. 21.10–59.13% higher net photosynthetic rates and 10.66–59.16% higher chlorophyll contents (chlorophyll a, chlorophyll b and total chlorophyll)… More >

  • Open Access


    Overview of Strain Characterization in Relation to Serological and Molecular Detection of Citrus tristeza Closterovirus

    Yasir Iftikhar1,*, Mazhar Abbas2, Mustansar Mubeen3, Muhammad Zafar-ul-Hye4,*, Faheema Bakhtawar1, Sonum Bashir1, Ashara Sajid1, Muhammad Asif Shabbir1

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.015508

    Abstract Tristeza is a devastating viral disease in all the citrus growing countries throughout the world and has killed millions of citrus trees in severely affected orchards. The citrus species grafted on sour orange rootstock are affected by this disease. Predominantly, the sweet orange, grapefruit and lime trees grafted on sour orange exhibit severe symptoms like quick decline, vein clearing, pin holing, bark scaling and degeneration leading to variable symptoms. Symptomatic expression of Citrus tristeza virus (CTV) in different hosts has been attributed to virus isolates which are from severe to mild. Different serological and molecular assays have been deployed to… More >

  • Open Access


    Exploration and Validation of the Potential Downstream Genes Underlying ipa1-2D Locus for Rice Panicle Branching

    Lin Zhang1,2,*, Dong Xie1, Zhong Bian1, Yiting Zou1, Han Zhou1, Wenlu Cai1, Hadi Yeilaghi1, Xiaolei Fan1,2, Changquan Zhang1,2, Qiaoquan Liu1,2,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.015229

    Abstract In recent years, some super hybrid rice varieties were bred with strong culms and large panicles, which are mainly contributed by the ipa1-2D locus. A gain-of-function allele of OsSPL14 is the ipa1-2D and it can greatly increase the panicle primary branch number. However, the key downstream genes mediating this trait variation are not fully explored. In this study, we developed high-quality near-isogenic lines (NILs) with a difference of only 30 kb chromosomal segment covering the ipa1-2D locus. Using the NILs, we explored the impact of ipa1-2D on five sequential stages of early inflorescence development, and found that the locus can… More >

  • Open Access


    Suppression Effects on Pineapple Soil-Borne Pathogens by Crotalaria juncea, Dolomitic Lime and Plastic Mulch Cover on MD-2 Hybrid Cultivar

    Luis Alfonso Aguilar Pérez1,*, Daniel Nieto Ángel1,*, Moisés Roberto Vallejo Pérez2, Daniel Leobardo Ochoa Martínez1, David Espinosa Victoria3, Andrés Rebolledo Martinez4, Abel Rebouças São José5

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.015109

    Abstract The development and implementation of sustainable and environmentally friendly agricultural practices are indispensable as alternatives to pesticide use and to keep populations of soil-borne plant pathogens at levels that do not affect crop productivity. The present research evaluates the incidence of soil-borne phytopathogens on the pineapple variety MD-2, which was subjected to different treatments: Incorporation of Crotalaria juncea into the soil (organic amendment), application of dolomitic lime to soil (inorganic amendment), and the use of plastic mulch covering the soil. During the crop cycle (15 months), the following variables were evaluated: plant height (cm), fruit weight (kg·plant−1 ), crop yield… More >

  • Open Access


    Soil Fungal Diversity and Community Composition in Response to Continuous Sweet Potato Cropping Practices

    Dan Xiang1,2, Yue Wu2, Huan Li2, Qing Liu2, Zhenfeng Zhou2, Qinghua Chen2, Nan Zhang3, Liang Xu1,2,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.014232

    Abstract Soil fungi are extremely important for maintaining soil health and plant production in agricultural systems. Currently, the effect of continuous cropping of sweet potato on soil fungal communities and physiochemical parameters has not been well documented. In the present study, four sweet potato fields consecutively monocultured for 1, 2, 3, and 4 years were selected to investigate the effect of monoculture on soil fungal communities through Illumina MiSeq sequencing. Continuous cropping of sweet potatoes dramatically altered the fungal community composition, whereas fungal diversity was almost unchanged. Ascomycota and Basidiomycota were the most abundant phyla in all soil samples, accounting for… More >

  • Open Access


    Non-Polar Chemical Constituents of Atemoya and Evaluation of the Cytotoxic and Antimicrobial Activity

    Suzana Vieira Rabêlo1, Fernanda Granja da Silva Oliveira2, Michele Miriam Calixto de Lira3, Livia Macedo Dutra3, Adilson Sartoratto4, Marta Cristina Teixeira Duarte4, Maria Claudia dos Santos Luciano5, Maria Francilene Souza Silva5, Cláudia do Ó Pessoa5, Manoel Odorico de Moraes Filho5, Emmanoel Vilaça Costa6, Jackson Roberto Guedes da Silva Almeida1,3,*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.013305

    Abstract This study aimed to identify the chemical composition of essential oil from fruits (EOAF) and the hexanic crude extract from aerial parts (At-Hex) of atemoya (Annona cherimola x Annona squamosa), a hybrid belonging to the Annonaceae family. Cytotoxic and antimicrobial activity was also evaluated. OEAF was obtained by hydrodistillation using a Clevenger apparatus, and their composition was analyzed by gas chromatography-mass spectrometry (GC-MS) analyses. Cytotoxicity was tested against human tumor cell lines HCT-116 (colon carcinoma), SF-295 (glioblastoma), OVCAR-8 (ovarian carcinoma) and HL60 (leukemia) using 3-(4,5-dimethyl-2-thiazolyl)-2,5- diphenyl-2H-tetrazolium bromide (MTT) assay, while antimicrobial activity was conducted by bioauthography method against eleven microorganisms… More >

  • Open Access


    CO2 Assimilation Rate in Production Systems for Papaya Crops

    R. Ariza-Flores1, D. Trujillo-García2, M. A. Otero-Sánchez2, E. Canales Sosa2, C. H. Avendaño-Arrazate3,*, L. A. Gálvez-Marroquín4, P. Cadena Iñiguez5

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.013227

    Abstract The aim of this study was to evaluate some physiological aspects of papaya crops in semi conventional and organic production systems. The following factors assessed in this experiment were: 1. Production systems (organic and semi conventional); 2. Genotypes (Maradol and Maradona F1), and 3. Cover crop plants (Canavalia, vegetative cover and no cover). Twelve treatments were obtained -product of factors’ combination- and distributed under a threerepetition experimental design of subdivided parcels. The factors examined in this study, that changed the CO2 assimilation rate, were production system and genotype. It was determined that the greatest gas exchange in papaya crops happened… More >

  • Open Access


    Colonization Characteristics and Diversity of Arbuscular Mycorrhizal Fungi in the Rhizosphere of Iris lactea in Songnen Saline-alkaline Grassland

    Chunxue Yang*, Yajie Liu, Wenna Zhao, Na Wang

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.015024

    Abstract To understand arbuscular mycorrhizal (AM) fungi resources and develop AM fungal species in ornamental plants with saline-alkaline tolerances, Iris lactea, which grows in the Songnen saline-alkaline grassland with a high ornamental value, was selected as the experimental material, and the colonization characteristics of its roots and the AM fungal diversity in its rhizosphere were explored. The results of the observations and calculations of mycorrhizae from ten different samples showed that AM fungi colonized the roots of I. lactea and formed Arum-type mycorrhizal structures. There was a significant correlation between soil spore density and pH value, while the colonization rate showed… More >

  • Open Access


    Soil Fungal Community Structure Changes in Response to Different Long-Term Fertilization Treatments in a Greenhouse Tomato Monocropping System

    Xiaomei Zhang, Junliang Li, Bin Liang*

    Phyton-International Journal of Experimental Botany, Vol., , DOI:10.32604/phyton.2021.014962

    Abstract Greenhouse vegetable cultivation (GVC) is an example of intensive agriculture aiming to increase crop yields by extending cultivation seasons and intensifying agricultural input. Compared with cropland, studies on the effects of farming management regimes on soil microorganisms of the GVC system are rare, and our knowledge is limited. In the present study, we assessed the impacts of different long-term fertilization regimes on soil fungal community structure changes in a greenhouse that has been applied in tomato (Solanum lycopersicum L.) cultivation for 11 consecutive years. Results showed that, when taking the non-fertilizer treatment of CK as a benchmark, both treatments of… More >

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