Hamptonmccall9362

Species of Alternaria (phylum Ascomycota, family Pleosporaceae) are known as serious plant pathogens, causing major losses on a wide range of crops. Alternaria atra (Preuss) Woudenb. & Crous (previously known as Ulocladium atrum) can grow as a saprophyte on many hosts and causes Ulocladium blight on potato. It has been reported that it can also be used as a biocontrol agent against a.o. Botrytis cinerea Here we present a scaffold-level reference genome assembly for A. atra. The assembly contains 43 scaffolds with a total length of 39.62 Mbp, with scaffold N50 of 3,893,166 bp , L50 of 4 and the longest 10 scaffolds containing 89.9% of the assembled data. RNA Seq-guided, gene prediction using BRAKER resulted in 12,173 protein-coding genes with their functional annotation. This first high-quality reference genome assembly and annotation for A. Atra can be used as a resource for studying evolution in the highly complicated Alternaria genus and might help understand the mechanisms defining its role as pathogen or biocontrol agent.Several ATP-Binding Cassette (ABC) transporters involved in the arbuscular mycorrhizal symbiosis and nodulation have been identified. We describe three previously-unreported ABC subfamily-B transporters, named ABCB for Mycorrhization and Nodulation (AMN1, AMN2, and AMN3), that are expressed early during infection by rhizobia and arbuscular mycorrhizal fungi. These ABCB transporters are strongly expressed in symbiotically infected tissues, including in root hair cells with rhizobial infection threads and arbusculated cells. During nodulation, the expression of these genes is highly induced by rhizobia and purified Nod factors, and was dependent on DMI3, but is not dependent on other known major regulators of infection such as NIN, NSP1, or NSP2. During mycorrhization their expression is dependent on DMI3 and RAM1, but not on NSP1 and NSP2. Therefore, they may be commonly regulated through a distinct branch of the common symbiotic pathway. Mutants with exonic Tnt1-transposon insertions were isolated for all three genes. None of the single or double mutants showed any differences in colonization by either rhizobia or mycorrhizal fungi, but the triple amn1 amn2 amn3 mutant showed an increase in nodule number. Further studies are needed to identify potential substrates of these transporters and understand their roles in these beneficial symbioses.Aquilaria sinensis (Lour.) Spreng, also known as eaglewood, belongs to the Thymelaeaceae family and has a considerably high medicinal value. It has been enlisted as the class II national key protective plant. In June 2019, about 15 percent of A. sinensis treelets in a forest area of China's Hainan province were observed to have the anthracnose symptoms. The diseased spots on leaves of A. sinensis treelets were usually round or irregular with pale yellow edges. The color of the center of the lesion was firstly light brown and then black or yellowish-brown. Small pieces of tissue from the edge of the leaf spots were surface sterilized in 75% alcohol for the 60s, washed twice with sterile distilled water, and then cultivated at 28 °C in darkness on potato dextrose agar (PDA) medium. One fungus was systematically isolated to get pure cultures. The culturing of the three isolates was carried out in PDA media at 28 °C for a week. The average diameter of the collateral colony was 6.80 ±0.60 cm. Initially, the fungalose-like symptoms were observed 6 days postinoculation. The control plant tissues remained healthy. Follow up reisolation of C. OX04528 solubility dmso enigma culture was obtained in PDA agar plates from leaf infected lesions, and the morphological features were found to be consistent with that of CX-0301 isolate, satisfying Koch's postulates. Based on the characterized information, it is the first report of Colletotrichum aenigma responsible for causing leaf spots on Aquilaria sinensis in China. Thereby, this provides a theoretical reference for the research and control of anthracnose on A. sinensis.Snake gourd (Trichosanthes cucumerina L.), an annual climbing plant belonging to the family of Cucurbitaceae, is native to Southeast Asia countries, e.g., India, Pakistan, Malaysia, China, and Indonesia. It is commonly consumed as a vegetable and also used as a traditional herbal medicine due to the antidiabetic, anti-inflammatory, antibacterial, hepatoprotective, and cytotoxic activities (Devi 2017). In September 2020, phytoplasma-induced disease symptoms such as little leaf, yellowing, phyllody, virescence, and witches' broom were observed on snake gourd in Yunlin County, Taiwan. The cross-sectional examination of the symptomatic plant by transmission electron microscopy showed typical phytoplasma-like pleomorphic bodies with spherical, oval and tubular shapes in sieve elements. Further examination by nested PCR revealed that a 1.2 kb DNA fragment for 16S rRNA gene was only amplified from symptomatic leaf of snake gourd using the phytoplasma universal primer pairs P1/P7 followed by R16F2n/R16R2. BLAST and iogen identified in snake gourd is identical with that of PnWB phytoplasma. In Taiwan, species of family Cucurbitaceae such as loofah, bitter gourd, and pumpkin are commonly infected by 16SrVIII phytoplasma (Davis 2017). In this study, we report for the first time that snake gourd, a species of family Cucurbitaceae, was infected by 16SrII-V PnWB phytoplasma in Taiwan.Sheath blight (ShB, caused by Rhizoctonia solani AG1-1A) and narrow brown leaf spot (NBLS, Cercospora janseana) are among the most important diseases affecting rice production in Texas and other southern United States. Because of high yielding potential, hybrid rice acreage has continually increased. Understanding the relative levels of resistance to ShB and NBLS in hybrids over inbreds is important to effective disease management but remain largely unknown. Comparative performance of hybrid rice and inbred rice was evaluated with 173 hybrid and 155 inbred genotypes (cultivars and elite breeding lines) over five crop seasons (2016 to 2020) and two locations in Texas. The results show that genotype, cultivar type (hybrid or inbred), location, and their interactions had a significant effect on the severity of ShB and NBLS. ShB severities in hybrid genotypes were significantly lower than in inbred genotypes, with an average of 27% reduction in disease severity over the 5 year x 2 location evaluation. Most (53%) of the hybrid genotypes were rated moderately resistant (MR), whereas almost all (97%) of the inbred genotypes ranged from very susceptible (VS) to moderately susceptible (MS).