Anatomic effects of barley yellow dwarf virus and maleic hydrazide on certain Gramineae

Esau, Katherine

doi:10.3733/hilg.v27n01p015

Cited by 17 publications

(6 citation statements)

References 37 publications

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“…For identification of cell types, paraffin sections were double stained with Safranin/Anilinblue as described in Gerlach (1969), and analysed according to Esau (1957).…”

Section: Histological Stainingmentioning

confidence: 99%

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Phytepsin, a barley vacuolar aspartic proteinase, is highly expressed during autolysis of developing tracheary elements and sieve cells

Runeberg-Roos

Saarma

1998

The Plant Journal

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“…For identification of cell types, paraffin sections were double stained with Safranin/Anilinblue as described in Gerlach (1969), and analysed according to Esau (1957).…”

Section: Histological Stainingmentioning

confidence: 99%

“…therefore opens a new path in PCD Structure of the vascular cylinder in the barley root. Protophloem sieve cell (a), metaphloem sieve cell (b), protoxylem tracheary elements (c), early metaxylem tracheary elements (d), and late metaxylem tracheary elements (e) are indicated according toEsau, 1957. Bar ϭ 100 µm.…”

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confidence: 99%

Phytepsin, a barley vacuolar aspartic proteinase, is highly expressed during autolysis of developing tracheary elements and sieve cells

Runeberg-Roos

Saarma

1998

The Plant Journal

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“…27, 28, Esau, 1957). Protoxylem, early meta xylem, and sieve elements of the protophloem are mature, or nearly so, within 350 p. of the root tip (d. plate 71, Esau, 1953). Cells of the endodermis are in various stages of maturity.…”

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confidence: 99%

“…Conspicuously absent from gamma-plantlets, except for the extreme apical portion of the first foliage leaf, are those cell types for whose differentiation unequal cell divisions presumably play an immediate role: guard cells, subsidiary cells, and hair-bearing cells (Esau, 1953). It remains for further studies to determine whether the guard cells and hair-bearing cells near the apex of the first foliage leaf of gamma-plantlets result from (1) unequal cell divisions which occurred during maturation of the embryo in the developing grain or (2) the differentiation of idioblasts without cell division during germination (d. differentiation of idioblastic sclereids in Camellia [Foard, 1959]).…”

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Anatomic Studies of Gamma‐irradiated Wheat Growing Without Cell Division

Foard

Haber

1961

American J of Botany

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Foard, Donald E., and Alan H. Haber. (Biol. Div., Oak Ridge Natl. Lab.,3 Oak Ridge, Tenn.) Anatomic studies of gamma‐irradiated wheat growing without cell division. Amer. Jour. Bot. 48(6): 438–446. Illus. 1961.—A morphological and histological study has been made of wheat seedlings growing without desoxyribonucleic acid (DNA) synthesis, mitosis, and cell division after gamma‐irradiation of the grain. The development of these seedlings parallels the normal development of unirradiated wheat in correlative growth of primordia and organs and in the production of highly differentiated cell and tissue types (e.g., trichoblasts, vascular elements, chlorenchymatous mesophyll, and cortical parenchyma). The absence of cell division makes these seedlings differ from unirradiated plants in several respects: no initiation of new organs; abnormal maturation of regions corresponding to the meristems; greater cell lengths. Guard cells, subsidiaries, and hair‐bearing cells are lacking, except in the apical 2–3 millimeters of the first leaf. Anatomic similarities of these plants to those treated with maleic hydrazide, including maturation to the tip of the roots, are discussed. The central cylinder of the upper pair of lateral seminal root primordia becomes highly differentiated with negligible elongation of the primordia. The occurrence of a high degree of differentiation after doses of radiation that produce extensive chromosome breakage indicates that in the absence of mitosis the chromosomes need not remain intact for the cells to continue differentiation. These studies show that such seedlings can be used to indicate the capacities of the cells in the embryo for differentiation without DNA synthesis, mitosis, and cell division.

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“…Why mildew was initially suppressed is not clear, although it is unlikely to be due to lack of carbohydrate as BYDV-infected barley leaves have an increased carbohydrate content as early as 7 days after virus infection (Orlob & Arny, 1961), several days before mildew was inoculated in these experiments. Changes in leaf structure induced by BYDV (Esau, 1957) may restrict germ tube penetration and slow the early stages of disease, but it was noticed that mildew colonies on BYDV-infected plants appeared larger and 'fluffier' than those on virus-free plants, although no measurements were taken. Thus, more vigorous growth and sporulation may, perhaps, more than compensate for fewer spores initially penetrating BYDV-infected plants.…”

Section: Discussionmentioning

confidence: 99%

The effects of barley yellow dwarf virus and powdery mildew in oats and barley with single and dual infections

Potter

1980

Annals of Applied Biology

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S U M M A R YPrior infection by barley yellow dwarf virus (BYDV) initially suppressed, then subsequently enhanced the amount of powdery mildew (Ervsiphe graminis DC ex Merat) on oat cv. Maldwyn and barley cv. Proctor. Carbendazim applied as a spray decreased mildew on virus-free and BYDV-infected plants, but had no effect on virus symptoms. In oats, both mildew and BYDV infection significantly increased the number of heads but decreased the number of grains per head. Mildew infection of BYDV-infected plants had no further effect. BYDV significantly increased the 1000 grain weight of oats, but mildew caused no significant alteration in grain weights of either virus-free or BYDV-infected plants. Both mildew and BYDV reduced the yield of oats, but mildew infection of BYDV-infected plants caused no further significant alteration. Percentage crude protein was increased in grain from both BYDVinfected and imildew-infected oats, but significantly only in BYDV-infected plants.In barley, the number of spikelets on the main shoot, the number of heads and the number of grains per head were all significantly reduced by BYDV but not by mildew. Mildew infection of BYDV-infected plants had no further effect. Both BYDV and mildew significantly reduced the 1000 grain weight of barley, but mildew infection of BYDV-infected plants caused a significant increase in 1000 grain weight compared to mildew-free, virus-infected plants. The yield of barley was significantly reduced by mildew and by BYDV, but no additional yield loss was caused by mildew infection of BYDV-infected plants. The percentage crude protein of barley was increased, but not significantly, by mildew and by BYDV.

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Anatomic effects of barley yellow dwarf virus and maleic hydrazide on certain Gramineae

Cited by 17 publications

References 37 publications

Phytepsin, a barley vacuolar aspartic proteinase, is highly expressed during autolysis of developing tracheary elements and sieve cells

Phytepsin, a barley vacuolar aspartic proteinase, is highly expressed during autolysis of developing tracheary elements and sieve cells

Anatomic Studies of Gamma‐irradiated Wheat Growing Without Cell Division

The effects of barley yellow dwarf virus and powdery mildew in oats and barley with single and dual infections

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