Showing papers in "Annals of Botany in 1978"

TL;DR: It is concluded that 'nodulated' plants grew more slowly than 'nitrate' plants in these experiments for at least two reasons: firstly, the symbiotic association fixed insufficient nitrogen for optimum growth and, secondly, the assimilation of the nitrogen which was fixed in the root nodules was more energy-demanding in terms of assimilate than that of plants which assimilated nitrogen by reducing nitrate in their leaves.

TL;DR: Investigations on the growth analysis of soya beans involved measurement of shoot and leaf growth by classical equations, regression procedures, and analysis of statistical parameters showed the superiority of using regression procedures.

TL;DR: This investigation was begun to see if leaves were modified internally as a consequence of development in such a culture environment, and Comparisons were made between leaves produced in culture, leaves produced by the regenerated plantlets after transplanting, and those of glasshouse-grown seedlings.

TL;DR: Clonal propagation of sugarbeet plants and the formation of polyploids by tissue culture is studied and the results show clear trends in progenyeny towards polyploidogenesis.

TL;DR: Callus was obtained from mature excised embryos of wheat, from nodal and internodal stem segments and from rachis segments using the medium of Murashige and Skoog (1962) (M medium), containing 1 *0 mg l"1 2,4-D, and from immature embryos using themedium of Green and Phillips (1975) containing 2 mg l", which had an enhanced potential for shoot initiation.

TL;DR: It was striking that while the HN leaves lost nitrogen only when they aged and died, the LN leaves started losing nitrogen before they had reached full expansion, and the significance to estimates of leaf death and total biomass production in the field, and to the understanding of the achievement of ceiling yield, are discussed.

TL;DR: Plants of the halophyte Suaeda maritima were grown in tap water or in a culture solution in the presence or absence of sodium chloride and the levels of sugars, amino acids, organic acids and quaternary ammonium compounds determined in relation to the balance between cytoplasmic and vacuolar water potentials.

TL;DR: Nine species of the cereal Eragrostis tef are closely related on morphological grounds and may be useful sources of genes for T'ef improvement.

TL;DR: It is concluded that there is no compelling evidence to indicate that improvements in total dry matter production rates, in the U.K., are likely to result from genetic manipulation of these characteristics in the existing range of plant material.

TL;DR: The effects of substrate content and temperature upon the production of carbon dioxide in the dark were investigated in Vicia faba and Sorghum vulgare, using the time courses for carbon dioxide release, and it is likely that incomplete hexose respiration, which occurs at high substrate contents, is less temperature sensitive than complete hexOSE respiration or the respiration of some other substrate.

TL;DR: At various points of the host-parasite interface, differentiation of xylem elements occurs, presumably maximizing nutrient transfer from host to parasite, and many proliferated host cells at the interface remain apparently meristematic.