Results 221 to 230 of about 224,115 (256)
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Patterns of variability in the diameter of lateral roots in the banana root system
New Phytologist, 2005The relative importance of root system structure, plant carbon status and soil environment in the determination of lateral root diameter remains unclear, and was investigated in this study. Banana (Musa acuminata) plants were grown at various moderate levels of soil compaction in two distinct experiments, in a field experiment (FE) and in a glasshouse ...
Loïc Pages, Harry Ozier-Lafontaine
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Relationships between root diameter, root length and root branching along lateral roots in adult, field-grown maize [PDF]
Annals of Botany, 2016 Root diameter, especially apical diameter, plays an important role in root development and function. The variation in diameter between roots, and along roots, affects root structure and thus the root system's overall foraging performance. However, the effect of diameter variation on root elongation, branching and topological connections has not been ...
Qian Wu, Loïc Pages, Pages Loïc
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Dependence of Root Cell Growth and Division on Root Diameter
Russian Journal of Developmental Biology, 2018Primary roots of 98 species from different families of monocotyledonous and dicotyledonous plants and adventitious roots obtained from bulbs and rhizomes of 24 monocot species were studied. Root growth rate, root diameter, length of the meristem and elongation zones, number of meristematic cells in a file of cortical cells, and length of fully ...
E. I. Bystrova +2 more
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Dynamic Normal Aortic Root Diameters: Implications for Aortic Root Reconstruction
The Annals of Thoracic Surgery, 2011The main aim of this study is to determine the normal diameter and the relationship of aortic root components in healthy adults, and to provide a morphologic foundation for future clinical applications.Echocardiography was performed in 314 normal subjects who were divided into five groups according to age.
Dan, Zhu, Qiang, Zhao
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Microscopic investigation of root canal diameters
The Journal of the American Dental Association, 1958Today, greater emphasis is placed on conserving teeth by means of endodontic treatm ent than was previously, and the need for research in this field has also increased. O ne of the phases of study tha t has been neglected until recently is the accurate determ ination of root canal size and taper.
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Precrop root system determines root diameter of subsequent crop
Biology and Fertility of Soils, 2015Little is known about the root distribution pattern of different root diameter classes as affected by crop sequence. Barley roots were sampled using the monolith method from 45 to 155 cm soil depth at the time of anthesis (BBCH = 61) after growing taprooted chicory and fibrous-rooted tall fescue precrops for two consecutive years.
Eusun Han, Timo Kautz, Ulrich Köpke
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Root diameter controls the accumulation of humic substances in decomposing root litter
Geoderma, 2019Abstract The humification of plant litter is a crucial step for the buildup of soil organic matter in terrestrial ecosystems. Yet, how environmental change and substrate quality affect root humification still remains poorly understood. A two-year litterbag experiment was conducted to assess the root mass remaining and accumulation of humic substances
Liyan Zhuang, Rui Yin, Xiangyin Ni
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Branchings in rooted graphs and the diameter of greedoids
Combinatorica, 1988Let G be a 2-connected rooted graph of rank r and A,B two (rooted) spanning trees of G. We show that the maximum number of exchanges of leaves that can be required to transform A into B is \(r^ 2-r+1(r>0)\). This answers a question by L. Lovász. There is a natural reformulation of this problem in the theory of greeoids, which asks for the maximum ...
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Influence of root diameter on the penetration of seminal roots into a compacted subsoil
Plant and Soil, 1992A field experiment was conducted to evaluate the influence of root diameter on the ability of roots of eight plant species to penetrate a compacted subsoil below a tilled layer. The soil was a fine sandy loam red-brown earth with a soil strength of about 3.0 MPa (at water content of 0.13 kg kg-1, corresponding to 0.81 plastic limit) at the base of a ...
S. A. Materechera +3 more
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Anatomical Science International, 2011
The purpose was to determine the diameter of the main root canal and wall thickness in the apical dentin in mesial roots of maxillary and mandibular molars. Forty mesiobuccal and mesial root specimens were sectioned horizontally at 1, 2 and 3 mm from the apex, and measured at each top surface by using optical microscopy to an accuracy of ×20 ...
Josué, Martos +4 more
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The purpose was to determine the diameter of the main root canal and wall thickness in the apical dentin in mesial roots of maxillary and mandibular molars. Forty mesiobuccal and mesial root specimens were sectioned horizontally at 1, 2 and 3 mm from the apex, and measured at each top surface by using optical microscopy to an accuracy of ×20 ...
Josué, Martos +4 more
openaire +2 more sources