Melting-out of Kentucky Bluegrass, a Low Sugar Disease

Lukens, Raymond J.

doi:10.1094/phyto-60-1276

Cited by 26 publications

(15 citation statements)

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“…It is also possible that, as Drechslera spp. are low sugar pathogens (Lukens, 1970), older plants in the field with low sugar contents are more susceptible. However, as results found in growth room inoculations showed the same trends as those from the field, it can be concluded that it is the disease which is causing most of the chemical changes observed.…”

Section: Discussionmentioning

confidence: 99%

Effect of fungal pathogens on digestibility and chemical composition of Italian ryegrass (Lolium multiflorum) and tall fescue (Festuca arundinacea)

Lam¹

1985

Plant Pathology

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Slight infection by Drechslera siccans or Rhynchosporium spp. significantly reduced in vitro dry matter digestibility, water‐soluble carbohydrate and the total amino acid content of Italian ryegrass (Lolium multiflorum) foliage. The concentration of all 15 amino acids detected was reduced, with arginine reduced significantly more than the others. Total nitrogen was either increased or not changed, and the amino acid composition was not altered. Limited work with Drechslera festucae on tall fescue (Festuca arundinacea) gave similar results. Small samples of healthy and diseased grass leaves at three different physiological stages were used to detect these changes. Limited leaf spotting by D. siccans caused metabolic changes of the same magnitude as extensive leaf blotching by Rhynchosporium. Impaired photosynthesis and growth of the fungi within the leaf tissues are possible causes of these changes. Decreased digestibility and increased dry matter content of diseased grass foliage could be of great practical importance.

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Section: Discussionmentioning

confidence: 99%

Effect of fungal pathogens on digestibility and chemical composition of Italian ryegrass (Lolium multiflorum) and tall fescue (Festuca arundinacea)

Lam¹

1985

Plant Pathology

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“…Specific carbohydrates like sucrose, glucose and galactose are correlated with disease resistance in some plant-pathogen interactions. Altering the sugar content of leaves has even been shown to be a possible way to control diseases (Lukens 1970), meaning that interfering with the physiology of the host could potentially offer an exciting opportunity to control diseases.…”

Section: Introductionmentioning

confidence: 99%

Carbohydrates and resistance to Phytophthora infestans in potato plants

Evers

Dommès

Hausman³

2003

Acta Physiol Plant

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Plants generally deal with biotic or abiotic stresses by altering components as for example cell wall constituents and metabolites. Infection by Phytophthora infestans, the causal agent of late blight, constitutes a stress condition for the plants and they react to it with changes arising in their metabolism depending on the resistance level of the plants. The present work compares two potato hybrids differing in their level of horizontal resistance to late blight. Carbohydrate content in stems and leaves of infected and uninfected plants was determined by HPLC. Some carbohydrates accumulated in the stems of the resistant hybrid infected by P. infestans, whereas they remained unchanged in the susceptible hybrid. On the other hand, in the leaves, these carbohydrates accumulated only in the infected susceptible hybrid.

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“…Some work has been done on the relationship of host sugars to leaf diseases of wheat (SIEBERT 1961, PRABHU andSWAMINATHAN 1968) and grass (LUKENS 1970) and the stalk rot complex of maize (CRAIG andHOOKER 1961, MORTI-MORE andWARD 1964) but not on footrot fungi of temperate cereals. GROSS-MANN (1968) suggested that many agricultural chemicals may alter resistance to disease by causing changes in host sugars and HUBER, SEELY and WATSON (1968) noted that physiological changes in wheat caused by the herbicide diuron may help to decrease the severity of eyespot lesions caused by Cercosporella herpotrichoides (= Pseudocercosporella herpotrichoides).…”

Section: Introductionmentioning

confidence: 99%