Investigations on the Nitrogenous Metabolism of the Higher Plants Part I

Chibnall, Albert Charles; Schryver, Samuel Barnett

doi:10.1042/bj0150060

Cited by 30 publications

(7 citation statements)

References 1 publication

(2 reference statements)

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“…Watering was adjusted so that the roots received frequent aeration yet the plants were never allowed to suffer from lack of moisture. Seedlings of this series were transferred to sand cultures on Oct. 13,1922, and 90 plants were grown till Feb. 22,1923. During this period a total of 17 applications of the full nutrient solution, and in addition four applications of a weak (.72 grams per L.) solution of KNO3 was given to each pot containing the nitrogen high plants.…”

Section: Methodsmentioning

confidence: 99%

EFFECTS OF CORRELATION BETWEEN VEGETATIVE AND REPRODUCTIVE FUNCTIONS IN THE TOMATO (LYCOPERSICON ESCULENTUM MILL.)

Murneek

1926

Plant Physiol.

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IntroductionThat a certain antagonism exists between vegetative growth and reproduction seems still to be the rather prevailing opinion among students of plant development. Luxurious vegetation is thought to be detrimental either to the initiation of gametes or to their union, resulting in a conspicuous absence of seeds and fruit, while a limited vegetative growth is considered to be the precursor of marked reproductive activities. In many instances this apparently is true. The facts, however, do not permit one to accept such a view as an axiomatic generalization, for careful analysis of the development of many plants leads to a diametrically opposite conception.Both empirical and experimental evidence leave one hardly room for doubt that only too frequently a clearly recognizable association does exist between excessive vegetation and lack of fruitfulness on one hand, and diminished growth and abundant seed formation on the other. The question is, however, which in this relationship is cause and which is effect; for our present knowledge of correlation, both quantitative and qualitative, between the various parts or organs of higher plants compels one to accept the existence of a causal relationship.Data may be marshalled showing the effects of growth on reproduction, but there is also ample proof of exactly the reverse situation. Plants belonging to all three groups-annuals, biennials and perennials-supply a large number of examples where it is clearly evident (1) that vegetative growth is almost quantitatively determined by the developing seeds and fruit; (2) that it often decreases at the exact time and in the exact proportion to the amount of flowers formed and seeds set; and (3) that the rate of vegetative growth is controlled by the developing fruit. These conceptions, though quite contrary to a current point of view, do not appear to be overdrawn. Because of the sequence in time, vegetation usually preceding reproduction, and because of the greater economic importance of

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Section: Methodsmentioning

confidence: 99%

EFFECTS OF CORRELATION BETWEEN VEGETATIVE AND REPRODUCTIVE FUNCTIONS IN THE TOMATO (LYCOPERSICON ESCULENTUM MILL.)

Murneek

1926

Plant Physiol.

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“…Modem work on the extraction of leaf proteins begins with Osborne & Wakeman (1920) who used spinach and Chibnall & Schryver (1921) who used cabbage. By grinding with water or ether-water they obtained about 60 % of the leaf nitrogen in solution.…”

mentioning

confidence: 99%

The extraction of nitrogenous materials from green leaves

Crook

1946

Biochemical Journal

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1. It has been found that a prostigmin analogue, the dimethylcarbamate of (2-hydroxy-5-phenylbenzyl)-trimethylammonium bromide (Hoffmann-LaRoche Nu-683) is capable of inhibiting selectively the activity of the non-specific or pseudo-cholinesterase.2. Injections of this compound have demonstrated that an almost complete inhibition of pseudo-cholinesterase in the blood and tissues of dogs can be effected without eliciting symptoms indicative of the accumulation of acetylcholine.3. Symptoms indicative of the accumulation of acetylcholine appear only when the activity of the specific or true cholinesterase is significantly depressed as well. 4. These results show that pseudo-cholinesterase plays no essential part in the hydrolysis of acetylcholine in vivo.

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“…Shortly afterwards, Beddoes suggested that it should be made into human food (9). Over the next 150 years there was occasional research, but it was not until the early 20th century that serious work began into the nature of the curd, the methods of separating it from the fibre and the nutritional value of both (10)(11)(12).…”

Section: Brief History and Current Status Of Leaf Concentrate In Humamentioning

confidence: 99%

Leaf concentrate and other benefits of leaf fractionation.

Davys¹,

Richardier²,

Kennedy³

et al. 2010

Combating Micronutrient Deficiencies: Food-Based Approaches

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Leaf concentrate is an extremely nutritious human food, containing approximately 50% (dry weight) highquality protein, together with numerous micronutrients, principally b-carotene, vitamins B 6 , B 9 , E and K, plus iron, calcium and magnesium. Many studies have shown that those consuming it recover quickly from nutritional anaemia and have a significantly improved general state of health. Today, over 40,000 people receive a daily serving of 10g of dried lucerne leaf concentrate. The fractionation of leaves was first reported over 200 years ago and has been the subject of extensive research and application since the 1940s. The process breaks down the original leaves into three products: residual fibre, 'whey' and leaf concentrate. The whey and the fibre are effective fertilizers, substrates for fermentation and/or animal feed. Through the use of all three products, leaf fractionation can be more productive, in terms of edible protein per hectare of land, than any other known agricultural method. This chapter presents the history and nutritional qualities of leaf concentrate, provides technical details of leaf fractionation at domestic and intermediate (community/semi-industrial) scales of production, and reviews studies that provide evidence for the effectiveness of leaf concentrate in improving human nutritional status. It concludes by reviewing the factors that have hitherto hindered the widespread adoption of leaf concentrate and leaf fractionation. The authors suggest how these may be overcome, and discuss the potentially wider role of leaf concentrate in alleviating human malnutrition, including its use in a locally produced ready-to-use therapeutic food.

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Investigations on the Nitrogenous Metabolism of the Higher Plants Part I

Cited by 30 publications

References 1 publication

EFFECTS OF CORRELATION BETWEEN VEGETATIVE AND REPRODUCTIVE FUNCTIONS IN THE TOMATO (LYCOPERSICON ESCULENTUM MILL.)

EFFECTS OF CORRELATION BETWEEN VEGETATIVE AND REPRODUCTIVE FUNCTIONS IN THE TOMATO (LYCOPERSICON ESCULENTUM MILL.)

The extraction of nitrogenous materials from green leaves

Leaf concentrate and other benefits of leaf fractionation.

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