Titration Curves of Etiolated and of Green Wheat Seedlings Reproduced With Buffer Mixtures

Hurd-Karrer, Annie M.

doi:10.1104/pp.5.3.307

Cited by 8 publications

(2 citation statements)

References 30 publications

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“…There is considerable literature on the buffer capacity of plant juices (3,4,5), and it is obvious that the combined effects of the partially neutralized organic acids, and of the phosphoric acid, as well as of the amino acids, and posssibly, to some-extent, of the soluble proteins result in systems that are remarkably stable with respect to change in hydrogen-ion activity.…”

Section: Introductionmentioning

confidence: 99%

Relationship of the Organic Acids of Tobacco to the Inorganic Basic Constituents

1938

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Section: Introductionmentioning

confidence: 99%

Relationship of the Organic Acids of Tobacco to the Inorganic Basic Constituents

1938

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“…In other words, the hydrogen-ion concentration in blueberry leaves is 100 to 1000 times greater than in leaves of most cultivated plants. Whereas in many plants the younger and more vigorous parts are higher in pH than older plant parts (7,12,17,18,21,24), in the blueberry the younger parts are lower. Conversely, whereas various deficiencies (8, 9, 10, 11, 18, 22) and incidences of disease (13, 14,16,21,23,24) caused a decrease in the pH of other plants, such conditions usually resulted in ani increase in the pH of the blueberry plant sap.…”

Section: Discussionmentioning

confidence: 99%

SIGNIFICANCE OF THE pH OF BLUEBERRY LEAVES

Kramer¹,

Schrader²

1945

Plant Physiol.

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Ecologically, the swamp, or highbush blueberry, Vacxiniunt corymbosum L., differs fundamentally from other cultivated plants in its requirements for an acid soil, a conistant source of moisture (6), and a relatively high anion nutrient uptake (19). In conjunction with studies on blueberry nutrition presented elsewhere (19), data were obtained on the effect of mineral nutrient deficiencies and age of leaves on the pH of the blueberry leaf sap. It was thought that these studies on the pH of the leaf sap might offer the key to an understanding of the mechanism by which the swamp blueberry can live in its usual environment.Materials and methods Dormant rooted blueberry cuttings of the Cabot variety were planted on January 7, 1942, in 54 coffee urn liners (glazed crocks) containing quartz sand, and accommodating two cuttings per crock. Beginning ten days later, nine different nutrient solutions were applied, designed to induce the following mineral nutrient deficiencies: None, nitrogen, phosphorus, potassium, calcium, magnesium, sulphur, iron, and boron. The composition of the solutions and the method of application have been previously described (19). As an added precaution, each solution was adjusted to a pH of 4.8-5.0 with hydrochloric acid. In all, six liners (12 plants) were treated with each of the nine solutions. Four plants from each treatment were removed for analyses on February 22 (46 days after planting), four others on March 15 (67 days after planting), and the remaining four on April 10, 1942 (93 days after planting).Determinations of the pH of the plant sap were made by means of a Coleman pH electrometer (model 3). Immediately after the removal of each plant, the sap for pH determinations was prepared by grinding a representative part of the current leaf growth in a mortar with a few milliliters of distilled water and quartz sand and decanting the supernatant liquid into the cuvette of the pH apparatus.

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Hydrogen‐ion Concentration of Leaf Juice in Relation to Environment and Plant Species

Hurd-Karrer¹

1939

American J of Botany

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Titration Curves of Etiolated and of Green Wheat Seedlings Reproduced With Buffer Mixtures

Cited by 8 publications

References 30 publications

Relationship of the Organic Acids of Tobacco to the Inorganic Basic Constituents

Relationship of the Organic Acids of Tobacco to the Inorganic Basic Constituents

SIGNIFICANCE OF THE pH OF BLUEBERRY LEAVES

Hydrogen‐ion Concentration of Leaf Juice in Relation to Environment and Plant Species

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