Journal of Biotechnology and Phytochemistry

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Perspective - Journal of Biotechnology and Phytochemistry (2023) Volume 7, Issue 2

Understanding the pathogenesis of puccinia striiformis to manage yellow rust in cereal crops

Ramya Krishna*

Department of Plant Pathology

*Corresponding Author:
Ramya Krishna
Department of Plant Pathology
University of Virginia
United States
E-mail:Krishna0018@virginia.edu

Received:31-Mar-2023, Manuscript No. AAJBP-23-97293; Editor assigned:03-Apr-2023, PreQC No. AAJBP-23-97293(PQ); Reviewed:17-Apr-2023, QC No. AAJBP-23-97293; Revised:22-Apr-2023, Manuscript No. AAJBP-23-97293(R); Published:29-Apr-2023, DOI:10.35841/ aajbp-7.2.145

Citation: Krishna R. Understanding the pathogenesis of puccinia striiformis to manage yellow rust in cereal crops. 2023;7(2):145

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Introduction

Puccinia striiformis, commonly known as yellow rust, is a fungal pathogen that infects cereal crops such as wheat, barley, and rye. This pathogen causes significant yield losses and has been a major concern for farmers worldwide. Understanding the pathogenesis of Puccinia striiformis is crucial for developing effective strategies to control this disease.

The life cycle of Puccinia striiformis involves both sexual and asexual reproduction. During the asexual phase, the fungus produces urediniospores, which are airborne and can travel long distances. These spores can infect wheat leaves and initiate the disease cycle. Once the spores land on a susceptible host, they germinate and form a germ tube that penetrates the plant's cell wall. The fungus then enters the plant's tissue, where it forms specialized feeding structures called haustoria. These haustoria are used by the fungus to extract nutrients from the plant, causing cell death and ultimately leading to the development of yellow rust symptoms. The pathogenicity of Puccinia striiformis is mediated by various virulence factors. The fungus produces effector proteins that are secreted into the plant's tissue, where they manipulate the plant's defense response. These effectors suppress the plant's immune system, allowing the fungus to establish a successful infection. The interaction between the fungus and the plant is complex, and the specific virulence factors involved in this process are still not fully understood [1].

Environmental factors also play a crucial role in the pathogenesis of Puccinia striiformis. The fungus thrives in cool and humid conditions and can survive in crop residues, which act as a source of inoculum for future infections. The pathogen can also overwinter on alternate hosts such as barberry, a common landscape shrub. Barberry serves as a reservoir for the fungus and can contribute to the spread of yellow rust to nearby cereal crops. The management of Puccinia striiformis relies on a combination of cultural practices, fungicides, and resistant cultivars. Crop rotation, sanitation, and timely planting can reduce the inoculum levels and minimize the disease's impact. Fungicides can be used to control the disease when the infection is severe, but their effectiveness can be limited by the emergence of fungicide-resistant strains of the fungus. The use of resistant cultivars is the most effective and sustainable way to manage the disease. Plant breeders are continually developing new cultivars with enhanced resistance to Puccinia Striiformis [2].

The pathogenesis of Puccinia striiformis is a complex process that involves various virulence factors and environmental factors. Understanding the mechanisms of pathogenesis is crucial for developing effective strategies to control the disease. The management of yellow rust relies on a combination of cultural practices, fungicides, and resistant cultivars. By implementing these measures, farmers can minimize the impact of Puccinia striiformis and ensure a sustainable production of cereal crops. Puccinia striiformis is a highly adaptable pathogen that can quickly evolve to overcome host resistance and adapt to changing environmental conditions. The emergence of new pathogenic races has been a significant challenge for cereal growers, and there is a constant need to develop new control measures [3].

Research on the pathogenesis of Puccinia striiformis has revealed that the fungus produces a wide range of effector proteins, which are secreted into the plant's apoplast and cytoplasm to manipulate the host's defense response. These effectors target various host pathways, including defense signaling, hormone synthesis, and cell death, to establish a successful infection. Recent studies have identified several effectors that are essential for pathogenicity, including AvrSr50, AvrP123, and AvrM-A. These effectors are required for the fungus to suppress host defense response and establish a successful infection [4].

Environmental factors also play a significant role in the pathogenesis of Puccinia striiformis. The fungus requires cool and humid conditions to infect cereal crops, and the disease is most severe in regions with prolonged periods of leaf wetness. Climate change has led to the emergence of new disease hotspots and the expansion of the disease range. Warmer temperatures and changes in rainfall patterns can increase the severity of yellow rust epidemics and make it challenging to control the disease. The management of Puccinia striiformis is challenging, and there is a constant need for new control measures. The use of resistant cultivars is the most effective and sustainable way to manage the disease. Plant breeders are continually developing new cultivars with enhanced resistance to Puccinia striiformis, and these cultivars have been successful in reducing the impact of the disease in many regions. However, the rapid emergence of new pathogenic races can quickly overcome host resistance, and there is a constant need for new sources of resistance [5].

Conclusion

The pathogenesis of Puccinia striiformis is a complex process that involves various virulence factors and environmental factors. Understanding the mechanisms of pathogenesis is crucial for developing effective strategies to control the disease. The management of yellow rust relies on a combination of cultural practices, fungicides, and resistant cultivars. By implementing these measures, farmers can minimize the impact of Puccinia striiformis and ensure a sustainable production of cereal crops. However, the emergence of new pathogenic races and changing environmental conditions requires constant vigilance and research to develop new control measures.

References

  1. Zhang Y, Qu Z, Zheng W, et al. Stage-specific gene expression during urediniospore germination in Puccinia striiformis f. sp tritici.. BMC genomics. 2008;9(4):1-8.

    2. Indexed at, Google Scholar, Cross Ref

  2. Yin C, Chen X, Wang X, et al. Generation and analysis of expression sequence tags from haustoria of the wheat stripe rust fungus Puccinia striiformis f. sp. tritici. BMC genomics. 2009;10(6):1-9.

    3. Indexed at, Google Scholar, Cross Ref

  3. Ma J, Huang X, Wang X, et al. Identification of expressed genes during compatible interaction between stripe rust (Puccinia striiformis) and wheat using a cDNA library. BMC genomics. 2009;10(1):1-2.

    4. Indexed at, Google Scholar, Cross Ref

  4. Zhang Z, Chen J, Su Y, et al. TaLHY, a 1R-MYB transcription factor, plays an important role in disease resistance against stripe rust fungus and ear heading in wheat. PLoS One. 2015;10(5):23-33.

    5. Indexed at, Google Scholar, Cross Ref

  5. Luo P.G, Ren Z.L, Zhang H.Q, et al. . Identification, chromosome location, and diagnostic markers for a new gene (YrCN19) for resistance to wheat stripe rust. Phytopathol. 2005;95(11):1266-70.

    6. Indexed at, Google Scholar, Cross Ref

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