Formative Effects of Certain Substituted Chlorophenoxy Compounds on Bean Leaves

Burton, Daniel F.

doi:10.1086/335467

Cited by 20 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Treatment of etiolated soybean seedlings with 2,4-D also results in an increase in ascorbic acid, soluble sulfhydryl, and protein sulfhydryl in the hypocotyl tissue (17). These changes showed a good correlation with the growth response produced by 2,4-D. Chinoy et al (6) hare also reported interactions of IAA and ascorbic acid in growth regulationl. These workers believe the oxidation-reduction state of the ascorbic acid system to be important in the conversion of vegetative growth into reproductivre growth (7).…”

Section: Methodsmentioning

confidence: 88%

Changes in Ascorbic Acid Metabolism Associated With Auxin-Induced Growth

Key

1962

Plant Physiol.

View full text Add to dashboard Cite

Much attention has been directed recently to an interaction of auxin with certain oxidation-reduction systems of the cell in an attempt to explain the action of auxin (2,17,20,22,24,25,26). In general, good correlations have been found between the enhanced rate of tissue growth as induced by auxin and the effects of auxin on the reduction state of the ascorbic acid and sulfhydryl systems of these tissues. The major portion of that work (which was carried out by the Milan group) was conducted on excised pea stem tissue. In the present investigation the effect of several known auxins and related compounds on the concentration and reduction level of ascorbic acid in intact cucumber plants has been studied. The results of these studies show that growth promotion is associated with an increase in ascorbic acid and a more reduced state, and that growth inhibition is associated with a decrease in ascorbic acid and a more oxidized system. Materials & MethodsCucumber seeds (variety Improved Long Green) were germinated in moist sand; the seedlings were transplanted into a sandy loam soil (2 plants/4 inch pot) when the first leaf was about one-tenth expanded. The plants were grown in the greenhouse before being transferred into a constant environment room (80 C, 60 % relative humidity, & a day-length of 16 hr at a light intensity of ca. 600 ft-c) 1 to 3 days prior to treatment. When the second leaf was about one-half to two-thirds expanded, a solution of the designated chemical containing 0.05 % Vatsol-OT was sprayed onto the upper leaf surface to run off. All chemicals were applied as the potassium salt at pH 5.5. At the appropriate time three plants of each treatment were harvested in duplicate. Leaf tissue, 3 g, was taken from each sample for ascorbic acid analyses. The

show abstract

Section: Methodsmentioning

confidence: 88%

Changes in Ascorbic Acid Metabolism Associated With Auxin-Induced Growth

Key

1962

Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…Characteristic abnormalities developed in a number of leaves that expanded after spraying (Plate 25a), but except when the plants were killed, normal leaves invariably developed later. The morphological and histological effects of 2,4-D on the leaves of French beans have been described by Burton (1947), Watson (1948), Felber (1948 and Eames (1951). These authors related the symptoms to the stage of development ofthe leaves at the time of treatment, and concluded that the leaves were susceptible from the time when wings of lamina tissue had developed in the bud until they were approximately 3 cm in length.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Sub‐lethal Doses of McPa on the Morphology and Yield of Vegetable Crops

Way¹

1963

Weed Research

View full text Add to dashboard Cite

Summary. The effects of sub‐lethal doses of MCPA‐sodium on the morphology, yield and maturity of French beans, and on the morphology of broad beans, were studied in field and glasshouse experiments. Epinasty in French beans developed at 0.002 lb/ac a.e., but formative effects were not seen at less than 0–1 lb/ac. With doses up to 0.4 lb/ac there was no significant reduction in yield or haulm weight, but at 1.0 lb/ac and above, yield was reduced and some of the plants sprayed at an early stage of growth were killed. There were characteristic modifications of the roots and stems and of those leaves which were at a susceptible stage of development when sprayed. Broad beans were only slightly injured by 0.2 lb/ac but were generally killed by 2.0 lb/ac. Abnormalities were noted in the germination of seed produced by affected plants. Effets de doses sub‐léthales de MCPA sur la morphologic et le rendement des cultures légumières IV. Haricots verts et fèves

show abstract

“…Any theory that attempts to explain the action of 2,4-D on plant tissues must account for observed structural changes in the plant. In cotton this herbicide induces modifications in both floral and vegetative parts similar to those it or other physiologically active substances induce in tomatoes (Zim merman and Hitchcock, 1941) and beans (Burton, 1947;Felber, 1948;Eames, 1951). The most apparent aberration is the bizarre shape and lighter color often assumed by the foliage leaves.…”

Section: Introductionmentioning

confidence: 86%

Effect of 2,4-D upon the development of the cotton leaf

Gifford¹

1953

Hilg

View full text Add to dashboard Cite

Excised tubers of nutgrass, Cyperus rotundus L, placed in flasks con taining either vermiculite or soil, were killed by fumigating with a com mercial formulation containing 55 per cent of l-chloro-3,bromopropene (CBP), added at the rate of 0.04 ml per liter of confined space. Maximum kill was attained after 5 hours' fumigation. The effectiveness of the fumigant was largely independent of tempera ture; but soil-moisture content three quarters or more of field capacity restricted movement of CBP vapor through the soil and imparted varying degrees of protection from the fumigant. Preliminary field trials indicate that 80 gallons of CBP formulation per acre, injected 8 inches deep with a weed gun, may be expected to give effective control of nutgrass infestations on well-tilled soils of moderately low moisture content. Soil compaction limited movement and reduced the effectiveness of the fumigant under field conditions. EFFECT OF 2,4-D UPON THE DEVELOPMENT OF THE COTTON LEAF Cytohistological studies indicate that in the terminal bud of cotton (Gossypium hirsutum L var. Acala), 2,4-D applied in sublethal dosage to the cotyledons affects the structure and morphology, not of the apical meristem itself, but of the organs and tissues derived from it. 2,4-D affects not only foliage-leaf primordio present at the time of application but also some that develop thereafter. Treated plants resemble untreated in the structure of the shoot apical meristem (though the dimensions differ) and in the initiation of new foliage leaves. The earliest divisions in the development of the leaf blade appear normal in treated plants. Subsequent ones, however, are pre cociously and predominantly periclinal, which results in the formation of a thick lamina. In addition to laterally contiguous bundles formed in a manner similar to that in untreated plants, accessory vascular bundles are present in the lamina which develop from derivatives of an extensive adaxial meristem. A mature leaf contains a large amount of vascular tissue surrounded in general by unspecialized parenchyma. In the shoot, xylem and sievetube elements differentiate in normal directions, but the former are re tarded in development and the latter accelerated as compared with those in untreated plants. In the shoots of untreated plants, the development of the procambium is continuous and acropetal. The anatomical responses induced by 2,4-D and those caused by other growth-regulating substances are briefly compared.

show abstract

Formative Effects of Certain Substituted Chlorophenoxy Compounds on Bean Leaves

Cited by 20 publications

References 0 publications

Changes in Ascorbic Acid Metabolism Associated With Auxin-Induced Growth

Changes in Ascorbic Acid Metabolism Associated With Auxin-Induced Growth

The Effects of Sub‐lethal Doses of McPa on the Morphology and Yield of Vegetable Crops

Effect of 2,4-D upon the development of the cotton leaf

Contact Info

Product

Resources

About