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Gurung, Allison M.; Pang, E. C. K.; Taylor, P. W. J.

doi:10.1071/ap01069

Cited by 39 publications

(8 citation statements)

References 11 publications

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“…as significant sources of inoculum to initiate disease epidemics on cultivated chick peas. In recent work, Le May et al (64) showed that the asexual stage of D. pinodes could be observed on pea, common vetch, and clover plants, suggesting that other legume species may also act as inoculum sources for epidemics on peas (65,(67)(68)(69). Legume species such as vetch or clover are generally sympatric to pea crops during the growing season but also persist during the intercropping season.…”

Section: Discussionmentioning

confidence: 99%

Aggressiveness Changes in Populations of Didymella pinodes over Winter and Spring Pea Cropping Seasons

Laloi

Montarry

Guibert

et al. 2016

Appl Environ Microbiol

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Ascochyta blight, caused by the necrotrophic ascomycete Didymella pinodes, is responsible for severe losses in winter and spring pea crops. Despite different climatic conditions, epidemics on winter and spring crops are due to a single population of D. pinodes, suggesting gene flow either between the two crops or from reservoir sources during the cropping season. This should lead to similar pathogenicity characteristics in isolates sampled from the two crops. However, these hypotheses have never been formally tested. We therefore sampled a total of 520 D. pinodes strains throughout a growing season from winter and spring pea plots (WP and SP, respectively) and from winter and spring trap plants (TWP and TSP). Amplified fragment length polymorphism (AFLP) markers revealed high genetic diversity within subpopulations, whereas pathogenicity tests showed that mean aggressiveness increases over the course of an epidemic. These results support the idea that alloinoculum contributes to the carryover of epidemics between winter and spring crops and that the most aggressive isolates are selected as an epidemic progresses. IMPORTANCEAscochyta blight, caused by Didymella pinodes, is responsible for severe losses in pea crops. While previous studies have shown that ascochyta blight epidemics on winter and spring crops are due to a single population of D. pinodes, suggesting that isolates from the two crops present similar pathogenicity characteristics, that hypothesis have never been tested. Genetic analysis of subpopulations sampled throughout a growing season from winter and spring pea plots revealed high genetic diversity within subpopulations, whereas pathogenicity tests showed that mean aggressiveness increases over the course of an epidemic.T he spatiotemporal dynamics of crop diseases are simultaneously impacted by pathogens, host plants, the environment, and human activities (1, 2). Indeed, whether or not hosts and pathogens interact is determined largely by spatial and temporal components of host and pathogen life history traits (3, 4). These interactions can thus be conceptualized as a continuous sequence of biological cycles, including dormancy, growth, reproduction, dispersal, and pathogenesis (5).Gene flow, resulting from pathogen reproduction and dispersal, can drastically increase the extent to which pathogen epidemics spread across a landscape (6). As such, it is a main factor in the transmission of disease to previously uninfected areas and drives the spatial structure of pathogen populations in fragmented landscapes by influencing the long-term survival and genetic composition of populations (7-9). Individual dispersal events, occurring over periods of days or weeks during both the cropping and intercropping seasons (2), originate from a large number of potential inoculum sources: resting structures in soil (mycelium, oospores, chlamydospores, or sclerotia), infested stubble left on the soil surface, infested seed, and alternative hosts (wild or cultivated plants, including volunteers). The degree ...

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Section: Discussionmentioning

confidence: 99%

Aggressiveness Changes in Populations of Didymella pinodes over Winter and Spring Pea Cropping Seasons

Laloi

Montarry

Guibert

et al. 2016

Appl Environ Microbiol

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“…A new protein PGIP-Polygalacturonase-Inhibiting Protein from its seeds play an significant role in plant protection against fungal infections by endo polygalacturonases (EPGs), the first enzymes released by phytopathogenic fungi during plant infection ( 86 ). It can be used in crop improvement as the effective donor source of resistance to Ascochyta blight compared to other field pea cultivars ( 87 , 88 ). The silver nanoparticles biosynthesized from grasspea species and Stachys lavandulifolia Vahl.…”

Section: Abandoned Neglected and Orphan Legume With Multiple Usesmentioning

confidence: 99%

“…Ascochyt a blight resistance was observed in various species of genus Lathyrus namely L. cicera, L. clymenum L., L. ochrus (L.) DC. and L. sativus as in comparison with the field peas ( 87 , 115 ). The gene expression for creating resistance against Ascochyta lathyri in grasspea has also been demonstrated ( 88 ).…”

Section: Breeding Efforts For Nutritional Gain In Grasspeamentioning

confidence: 99%

Rediscovering the Potential of Multifaceted Orphan Legume Grasspea- a Sustainable Resource With High Nutritional Values

et al. 2022

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The genus Lathyrus consists of more than 184 herbaceous annual and perennial species suitable for multifaceted sustainable food and feed production system in the arid and semi-arid regions of the world. The grasspea is a promising source of protein nutrition. However, its potential is not being utilized fully due to the presence of neurotoxin content (β-N-oxalyl-l-α, β diaminopropionic acid, β-ODAP), a causal agent of non-reversible lower limbs paralysis. The high protein contents in seeds and leaves with ~90% digestibility make it sustainable super food to beat protein malnutrition in future. Therefore, it is desired to breed new grasspea cultivars with low β-ODAP contents. Limited research has been carried out to date about this feature. A draft genome sequence of grasspea has been recently published that is expected to play a vital role in breeding and identifying the genes responsible for biosynthesis pathway of β-ODAP contents in grasspea. Efforts to increase awareness about the importance of genus Lathyrus and detoxify β-ODAP in grasspea are desired and are in progress. Presently, in South Asia, systematic and dedicated efforts to support the farmers in the grasspea growing regions by disseminating low β-ODAP varieties has resulted in a considerable improvement in reducing the incidence of neurolathyrism. It is expected that the situation will improve further by mainstreaming grasspea cultivation by implementing different approaches such as the development and use of low β-ODAP varieties, strengthening government policies and improved detox methods. The present review provides insight into the multifaceted characteristics of sustainable nutritious grasspea in the global and Indian perspective.

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“…Similarly, cross inoculations studies showed that grass pea accessions can be very susceptible to A. pinodes, but are immune or highly resistant A. rabiei, A. lentil, and A. fabae isolates [78]. Ascochyta lathyri has been reported in other Lathyrus species, but not on grass pea [80]. Nevertheless, resistance to A. pinodes has been recorded on accessions of L. sativus [80][81][82].…”

Section: Grass Pea Biotic Stresses Resistancementioning

confidence: 99%

Grass Pea (Lathyrus sativus L.)—A Sustainable and Resilient Answer to Climate Challenges

et al. 2022

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Grass pea (Lathyrus sativus L.) is an annual cool-season grain legume widely cultivated in South Asia, Sub-Saharan Africa, and in the Mediterranean region. It is a stress-resilient crop with high nutritional value, considered a promising source of traits to breed for adaptation/mitigation of climate change effects. It is also reported as a suitable crop for more sustainable production systems such as intercropping. In this review, we elaborate an integrative perspective including not only an agronomic-based but also a variety-breeding-based strategy in grass pea to deal with climate change impacts, summarizing the current knowledge on grass pea biotic/abiotic stress resistance. Additionally, we highlight the importance of implementing fundamental techniques to create diversity (as interspecific hybridization or gene editing) and increase genetic gains (as speed breeding or the efficient identification of breeding targets via genomics) in the development of multiple stress-resistant varieties that simultaneously provide yield and quality stability under climate vulnerable environments.

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Untitled

Cited by 39 publications

References 11 publications

Aggressiveness Changes in Populations of Didymella pinodes over Winter and Spring Pea Cropping Seasons

Aggressiveness Changes in Populations of Didymella pinodes over Winter and Spring Pea Cropping Seasons

Rediscovering the Potential of Multifaceted Orphan Legume Grasspea- a Sustainable Resource With High Nutritional Values

Grass Pea (Lathyrus sativus L.)—A Sustainable and Resilient Answer to Climate Challenges

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