Histopathology of Seed-Borne Infections

Singh, Dalbir; Mathur, S. B.

doi:10.1201/9781420038170

Cited by 49 publications

(38 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is less likely to be the case in chickpeas as Arabidopsis belongs to a different Family (Brassicaceae, as compared to Fabaceae) which have distinctly different flower and seed characteristics. In particular, the seed coat of Arabidopsis conveys dormancy (Debeaujon, Léon-Kloosterziel & Koornneef, 2000) and its pigmentation is located in the innermost seed coat layers (Bouman, 1975) whereas chickpea seeds have no dormancy and the pigmentation is derived from the outermost seed coat layers (Singh & Mathur, 2004). In addition, while both genes confer a more rounded eccentricity, the ats mutant of Arabidopsis was found to be single recessive (Léon-Kloosterziel et al, 1994) whereas the Rd allele of chickpea was single dominant (Knights et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Milling Performance and Other Quality Traits Affected by Seed Shape in Isogenic Lines of Desi Chickpea (Cicer arietinum L.)

Wood¹,

Knights²,

Harden³

et al. 2012

JAS

View full text Add to dashboard Cite

Milling of pulses generally involves removal of the seed coat and splitting of the cotyledons to produce splits or 'dhal'. The aim of this research was to investigate whether seed shape affected seed quality using two sets of near-isogenic lines differing by a single allele at the seed shape locus (Rd/rd). Seed shape had a profound effect on milling quality: rounded seeds produced 7% more dhal than their angular counterparts. There were also significant effects on other quality parameters attributable to seed shape: rounded seeds had less seed coat content because it was thinner, a more intense seed coat colour, faster water absorption but lower hydration capacity and a slightly longer dhal cooking time. This study shows that seed shape is more important than seed coat thickness from a milling perspective and suggests that breeding programs should select for rounder shaped desi chickpeas to maximise dhal yields and profitability for the splitting industry.

show abstract

Section: Discussionmentioning

confidence: 99%

Milling Performance and Other Quality Traits Affected by Seed Shape in Isogenic Lines of Desi Chickpea (Cicer arietinum L.)

Wood¹,

Knights²,

Harden³

et al. 2012

JAS

View full text Add to dashboard Cite

show abstract

“…Al respecto, Agarwal & Sinclair (1997), Neergaard (1979) y Singh & Mathur (2004) afirman que el proceso de transmisión de patógenos es influenciado por diversos factores, entre los cuales se mencionan la especie cultivada (resistencia varietal), condiciones ambientales (temperatura, luz, lluvia, humedad ambiental), tipo, humedad y microflora de suelo, pH, población de plantas, profundidad de siembra, fertilización, supervivencia del inóculo, vigor de la semilla, y localización del inóculo. La ubicación del patógeno en la semilla es considerado como uno de los más importantes en los estudios de transmisión (Singh & Mathur, 2004).…”

unclassified

Transmisión de Trichoconiella padwickii a coleóptilos de arroz

Echeverria

Carmona

Gutiérrez

2013

Trop. plant pathol.

View full text Add to dashboard Cite

RESUMENEl hongo Trichoconiella padwickii es uno de los principales patógenos de la semilla de arroz en la provincia de Corrientes, Argentina. Con el objetivo de cuantificar la eficiencia de transmisión (ET) desde la semilla a coleóptilos de arroz se realizó un ensayo "in vivo", utilizando semillas de las variedades BRS Taim, Puitá Inta-CL e Irga 424. Las semillas se sembraron en bandejas plásticas conteniendo arena estéril como sustrato e incubadas en laboratorio en condiciones de 25 ± 2ºC y fotoperiodo de 12 h. La ET se evaluó a los siete días, sobre 400 coleóptilos sembrados en medio agar poroto 3%. El patógeno presentó los siguientes valores de ET: 7% para la variedad BRS Taim; 28,5% en Puitá Inta-CL y 8,1% en la variedad Irga 424. Se demostró la importancia de la semilla como fuente de inóculo de T. padwickii. Palabras-claves: Oryza sativa, fuente de inóculo, semillas. ABSTRACT Transmission of Trichoconiella padwickii to rice coleoptilesThe fungus Trichoconiella padwickii is one of the main pathogens of rice seed in the province of Corrientes, Argentina. With the objective of quantifying the transmission efficiency (TE) from rice seed to coleoptiles, a trial was conducted "in vivo" using seeds of the varieties BRS Taim, Puitá Inta-CL and Irga 424. Seeds were sown in plastic trays containing sterile sand as substrate and incubated in laboratory conditions at 25±2ºC and photoperiod of 12 h. The TE was evaluated after seven days using 400 coleoptiles put on agarbean medium 3%. The TE was 7%, 28.5% and 8.1% for varieties BRS Taim, Puitá Inta-CL and Irga 424, respectively, demonstrating the importance of seeds as an inoculum source of T. padwickii.

show abstract

“…michiganensis has been previously observed (2,30). However, no detailed histopathological study had been performed on the routes of seed infection (18). To see the impact of different stages of fruit development on fruit and seed infection by C. michiganensis subsp.…”

Section: Discussionmentioning

confidence: 99%

“…michiganensis, is a systemic pathogen it is hypothesized that it accesses the developing seeds via the host vascular system (1). One of the earliest studies on bacterial canker looked at the systemic movement of the pathogen to the seeds; however, no detailed histopathological studies have clearly demonstrated this natural route of seed infection (2,18), and the significance of bird's-eye lesions in fruit colonization remains unstudied. Our working hypothesis was that seed contamination by C. michiganensis subsp.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Tomato Fruit and Seed Colonization by Clavibacter michiganensis subsp. michiganensis through External and Internal Routes

Tancos

Chalupowicz

Barash

et al. 2013

Appl Environ Microbiol

View full text Add to dashboard Cite

cThe Gram-positive bacterium Clavibacter michiganensis subsp. michiganensis, causal agent of bacterial wilt and canker of tomato, is an economically devastating pathogen that inflicts considerable damage throughout all major tomato-producing regions. Annual outbreaks continue to occur in New York, where C. michiganensis subsp. michiganensis spreads via infected transplants, trellising stakes, tools, and/or soil. Globally, new outbreaks can be accompanied by the introduction of contaminated seed stock; however, the route of seed infection, especially the role of fruit lesions, remains undefined. In order to investigate the modes of seed infection, New York C. michiganensis subsp. michiganensis field strains were stably transformed with a gene encoding enhanced green fluorescent protein (eGFP). A constitutively eGFP-expressing virulent C. michiganensis subsp. michiganensis isolate, GCMM-22, was used to demonstrate that C. michiganensis subsp. michiganensis could not only access seeds systemically through the xylem but also externally through tomato fruit lesions, which harbored high intra-and intercellular populations. Active movement and expansion of bacteria into the fruit mesocarp and nearby xylem vessels followed, once the fruits began to ripen. These results highlight the ability of C. michiganensis subsp. michiganensis to invade tomato fruits and seeds through multiple entry routes.

show abstract

Histopathology of Seed-Borne Infections

Cited by 49 publications

References 0 publications

Milling Performance and Other Quality Traits Affected by Seed Shape in Isogenic Lines of Desi Chickpea (Cicer arietinum L.)

Milling Performance and Other Quality Traits Affected by Seed Shape in Isogenic Lines of Desi Chickpea (Cicer arietinum L.)

Transmisión de Trichoconiella padwickii a coleóptilos de arroz

Tomato Fruit and Seed Colonization by Clavibacter michiganensis subsp. michiganensis through External and Internal Routes

Contact Info

Product

Resources

About