ROOT ANATOMY AND LATERAL ROOT POSITION IN MONOCOTS IN RELATION TO THE ABSENCE OF SECONDARY THICKENING

2018 ◽  
pp. 286-300
Author(s):  
M.E. Ploshinskaya ◽  
Keyword(s):  
Lateral Root ◽  
Root Anatomy ◽  
Secondary Thickening ◽  
Root Position

The origin and development of root buds in Asclepias syriaca

1982 ◽  
Vol 60 (10) ◽  
pp. 2119-2125 ◽  
Author(s):  
Patricia L. Polowick ◽  
M. V. S. Raju
Keyword(s):  
Lateral Root ◽  
Early Stage ◽  
Lateral Roots ◽  
Cambial Activity ◽  
Root Anatomy ◽  
Main Root ◽  
Asclepias Syriaca ◽  
Bud Development ◽  
Vascular Connections ◽  
Root Buds

The persistence of Asclepias syriaca L. as a weed is related to its ability to propagate vegetatively by the development of adventitious buds on roots. These root buds arise on the main root and upper lateral roots within 25 days of the establishment of seedlings and are generally associated with the bases of lateral roots. A study of root anatomy shows that the origin of these buds is endogenous, in the pericycle and (or) its derivatives. No root buds are initiated until after lateral roots have developed and some cambial activity has begun. Vascular connections from the bud to the stele of the parent root, or an associated lateral root, are made at an early stage of bud development.

Root system morphology and primary root anatomy in natural non-metallicolous and metallicolous populations of three Arabidopsis species differing in heavy metal tolerance

Biologia ◽  
2012 ◽  
Vol 67 (3) ◽  
Author(s):  
Andrea Staňová ◽  
Eva Ďurišová ◽  
Viera Banásová ◽  
Erika Gurinová ◽  
Miriam Nadubinská ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Root Growth ◽  
Root System ◽  
Lateral Root ◽  
Root Elongation ◽  
Metal Tolerance ◽  
Heavy Metal Tolerance ◽  
Root Density ◽  
Root Anatomy ◽  
Arabidopsis Species

AbstractRoot system morphology was characterized in the seedlings of heavy-metal sensitive Arabidopsis thaliana, the non-metallicolous (NM) and metallicolous (M) populations of the tolerant A. arenosa and A. halleri, developed on the natural soils: the Zn-Pb-Cd-Cu-contaminated (C soils), the non-contaminated (NC soils), and on an identical nutrient-rich compost. Anatomy of primary roots grown on agar medium with control and elevated zinc concentrations was investigated also in the model A. thaliana ecotype Columbia.The three Arabidopsis species differed in morphological and/or quantitative responses to the varying soil qualities. Comparing to natural NC soil, the morphology of A. thaliana root system differed only on the compost with dominating lateral root lengths while the root lengths were reduced on the C soil. In NM and M populations of A. arenosa the lateral root elongation and density were reduced on the C soil and root growth but not lateral root density were stimulated on the compost. In NM and M populations of A. halleri the root system morphology remained unaltered in all three soils. The root elongation was reduced but lateral root initiation increased on the C soil while the roots were longer and lateral root density lower on the compost. The responses of A. arenosa or A. halleri populations differed only in absolute root lengths. The similarity in morphological responses to varying soil metal contents indicated plastic responses rather than heritable traits of the root systems.The root tissue organization three Arabidopsis species resembled the known A. thaliana ecotype Columbia. Quantitatively, the tolerant species and their M populations had thicker roots due to a greater number and size of cells in epidermis, cortex including a higher number of middle cortex cells, and endodermis. The rates of root growth and quantitative root anatomy may represent morphological traits contributing to heavy metal tolerance of the Arabidopsis species.

Root anatomy of palms II. Calamoideae

1996 ◽  
Vol 107 (1-2) ◽  
pp. 43-59 ◽  
Author(s):  
E. Seubert
Keyword(s):  
Root Anatomy
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