Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata

Le, Duy Phu; Gregson, Aphrika

doi:10.1007/s13313-019-0617-9

Cited by 10 publications

(6 citation statements)

References 19 publications

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“…Bhuiyan et al (2007) reported that species of A. macrospora was most prevalent during early growth period and A. alternata species was more prevalent during the end of growing season responsible for defoliation and higher disease severity. Le and Gregson (2019) reported that, severe disease outbreaks were recorded in multiple cotton crops in south Wales (NSW) in the 2017/18 season.…”

Section: Resultsmentioning

confidence: 99%

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Rajesha¹,

Nakkeeran²,

Indumathi³

et al. 2021

JEB

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Aim: To identify the resistant source present in the breeding materials against Alternaria leaf blight disease of cotton (Gossypium spp.). Methodology: Breeding entries were sown in a randomized complete block design in the experimental site. Disease intensity on each genotype at 45, 90, 135 and 180 days after sowing (DAS) were recorded from leaves of lower, middle and upper parts of plants and graded. According to 0 - 4 disease scoring scale, per cent disease index (PDI) was calculated and genotypes were categorized into different categories based on disease reaction Results: Development of Alternaria disease was noticed at early days of crop growth in few genotypes and the disease increased upto 135 days after sowing. The maximum mean per cent disease index of 41.17 and 40.06 were recorded in Br.14a (ZT)1333 and Br.14a (ZT)1332 respectively. The least PDI of 0.58 was recorded in Br.03a (ZT)1303. Disease incidence of <11.00% of was reported in 37 entries at 45 days after sowing. None of the genotypes showed apparently immune reaction, twenty-one genotypes showed resistant reaction, eleven genotypes were moderately resistant and five showed moderately susceptible reaction. Interpretation: Twenty-one breeding lines showed resistant reaction against Alternaria leaf blight disease under field conditions, however, further utilization of these lines may be carried out in breeding programmes for the development of resistant source against this disease.

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Section: Resultsmentioning

confidence: 99%

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Rajesha¹,

Nakkeeran²,

Indumathi³

et al. 2021

JEB

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“…Likewise, species of Banksiamyces and Alternaria have been associated with causing decay in lignified tissue of the host plant (Beaton and Weste 1984;Sharma et al 2016), and some species of Alternaria have been associated with causing disease on cotton (Le and Gregson 2019), pistachio (Ash and Lanoiselet 2001) and canola (Al-Lami et al 2019). In other instances, Alternaria has been associated with promoting plant growth through increasing root growth (Zhou et al 2018) and increasing seed size (Lindblom et al 2018).…”

Section: Discussion: Implications For Restoration and Conservation Pr...mentioning

confidence: 99%

Integrating seed microbiome knowledge into restoration and ex situ conservation of native Australian plants

et al. 2023

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Context Seeds harbour a diversity of microbes, which in some plants aid with germination and establishment. Seeds form a critical part in the lifecycle of plants and a role in many conservation and restoration activities. Aims Because this is an emerging field in seed biology, we aim to highlight the key research gaps of interest to seed on the basis of restoration and ex situ conservation. Methods We identify knowledge gaps associated with the seed endophytic microbiome of native Australian plants through undertaking a literature review. Additionally, culturing methods were used to identify the fungal seed endophytes of five native Australian species. Key results We identified a diversity of taxa within the native seed and show three taxa that are common to all study hosts. Sampling seed from additional hosts at a site and additional sites of a host species showed new fungal diversity. Our literature review showed that little information is available on native seed microbiomes and we identified four key areas where research gaps exist, linking with seed-based restoration practices. Conclusions We provide evidence that there is a complex and diverse seed microbiome within some Australian native plants and suggest ways that it could be integrated into restoration and conservation practices. Implications We propose that by taking into consideration the presence of a seed microbiome and its potential impacts on plant health, seed microbiomes could be used as one method to restore microbial diversity into an ecosystem and to contribute to the seedling microbiome and plant health at restored sites.

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“…The two isolates were further studied by PCR amplification and sequencing using the ITS4/ITS5 and Btub2Fd/ Btub4Rd pairs for the internal transcribed spacer (ITS) and beta‐tubulin loci, respectively (Damm et al., 2009; Le & Gregson, 2019). BLAST searches of the ITS (GenBank Accession No.…”

Section: Figurementioning

confidence: 99%

Alternaria leaf spot of cotton seedlings grown in New South Wales, Australia is predominantly associated with Alternaria alternata

Cited by 10 publications

References 19 publications

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Response of cotton genotypes against the incidence of Alternaria leaf blight of cotton under field conditions

Integrating seed microbiome knowledge into restoration and ex situ conservation of native Australian plants

First report of Colletotrichum truncatum associated with cotton boll rot in New South Wales, Australia

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