By F. C. Steward
Plant body structure, quantity VA: research of progress: habit of vegetation and their Organs describes the most occasions of development as noticeable in the course of the habit of crops and their organs at an organismal point. This publication discusses the quantitative interpretation of progress; the results of environmental elements; the remedy of tropism; and the consequences of many exogenous growth-regulating compounds.
Organized into 5 chapters, the ebook in the beginning describes mathematically the plant progress mechanisms as they relate to the criteria that ensure morphogenesis. The textual content additionally discusses equipment for assessing the results of exterior stipulations and of age on definite vital physiological facets of plant development. the following bankruptcy offers with phyllotaxis as a particular element of the translation of development and shape. The 3rd bankruptcy describes numerous phototropically and geotropically delicate platforms impinge upon on plant progress. This bankruptcy additionally covers a few reversible nastic routine of organs and the strategy pursuits of loose swimming cells. the subsequent bankruptcy offers with relatives among the chemical constitution of artificial compounds and their organic motion. The final bankruptcy makes a speciality of the modulation of progress and improvement by way of good points of our surroundings and likewise upon experimental manipulation and lower than managed stipulations of progress.
This quantity is a useful source for plant biologists, physiologists, and researchers.
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Extra resources for Analysis of Growth: Behavior of Plants and their Organs
Its growth rates in terms of W are related to k less simply than in the other functions; moreover, they are dependent also on b. On the other hand, the expression for the relative rate in terms of time is particularly simple. In order to eliminate b from this growth equation, time unity must be defined as that time when W — 1, or alternatively unit size be taken as the size attained at some arbitrarily defined t = 1. Finally, the forms of two time power curves representing different values of k are not interconvertible by a proportional rescaling of the axes (although curves differing in b only are obviously transformable by these means).
Since this latter is equal to ( 1 / W ) · ( d W / d f ) , the instantaneous slopes meas ure the changing relative growth rate in the original data; hence (logeWt — l o g e W 0 ) / i is the true mean relative rate over the whole period, quite regardless of the form of the growth curve between W 0 and Wt. This valuable property of the logged values of any growth characteristic was pointed out by Fisher ( 2 9 ) , but it is still by no means universally appreciated by those concerned with growth measurements.
In most examples of this kind the growing region is terminal, but on occasion it may be inter calary; thus in Laminaria it lies between the blade and stipe, both of which extend by its activity. " Ideally the growing region should change neither in size nor in activity, hence it is not surprising to find that true linear growth is exceptional, although approximations to it are frequent. It may be associated at the one extreme with the extension of only a single cell, as in root-hair development, and at the other with an elaborately correlated pattern of both cell division and extension, as in an entire root, each successive element of which undergoes in its turn a grand period of growth.
Analysis of Growth: Behavior of Plants and their Organs by F. C. Steward