Anatomy of Nodal Roots in Tropical Upland and Lowland Rice Varieties
Nodal root anatomy was compared among twelve upland and lowland rice (Oryza sative L.) varieties with tropical origin which were grown in hydroponic culture and under field conditions. The traditional upland japonica varieties showed the largest diameter of root, stele, and xylem vessel followed by...
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2000-01-01
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Online Access: | http://dx.doi.org/10.1626/pps.3.437 |
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doaj-8f85acfc7721410fb57be24a86b8e0832020-11-25T00:04:25ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082000-01-013443744510.1626/pps.3.43711644454Anatomy of Nodal Roots in Tropical Upland and Lowland Rice VarietiesMotohiko Kondo0Albert Aguilar1Jun Abe2Shigenori Morita3International Rice Research InstituteInternational Rice Research InstituteThe University of TokyoThe University of TokyoNodal root anatomy was compared among twelve upland and lowland rice (Oryza sative L.) varieties with tropical origin which were grown in hydroponic culture and under field conditions. The traditional upland japonica varieties showed the largest diameter of root, stele, and xylem vessel followed by modern upland varieties. There was a clear varietal difference in the ratio of stele to root diameter, which was associated with the genetic group rather than with the ecosystems. The japonica varieties had a significantly larger stele diameter relative to the root diameter than indica and aus varieties. The indica and aus varieties displayed more xylem vessels per unit area of stele than the japonica varieties, but the diameter of xylem vessel was smaller. Equivalent xylem vessel diameter (De) was more dependent on the number of xylem in the indica varieties than in the japonica varieties. Distinctly different types of sclerenchyma anatomy were identified among the varieties. The development of sclerenchyma was classified into four different types based on thickening of cell wall in the outer cortical parenchyma and the number of sclerenchymatous cell layers. Like the xylem anatomy, the varietal differences in sclerenchyma development were more associated with genetic group rather than the ecotype. The japonica varieties had higher frequency of the types which have a doubled cell layer in sclerenchyma with thick cell wall than indica and aus. The difference among the genetic groups was nearly consistent across growing conditions, aerobic and submerged soils. These results indicated that sclerenchyma development is controlled by a genetic factor.http://dx.doi.org/10.1626/pps.3.437Nodal rootSclerenchymaUpland riceXylem vessel |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Motohiko Kondo Albert Aguilar Jun Abe Shigenori Morita |
spellingShingle |
Motohiko Kondo Albert Aguilar Jun Abe Shigenori Morita Anatomy of Nodal Roots in Tropical Upland and Lowland Rice Varieties Plant Production Science Nodal root Sclerenchyma Upland rice Xylem vessel |
author_facet |
Motohiko Kondo Albert Aguilar Jun Abe Shigenori Morita |
author_sort |
Motohiko Kondo |
title |
Anatomy of Nodal Roots in Tropical Upland and Lowland Rice Varieties |
title_short |
Anatomy of Nodal Roots in Tropical Upland and Lowland Rice Varieties |
title_full |
Anatomy of Nodal Roots in Tropical Upland and Lowland Rice Varieties |
title_fullStr |
Anatomy of Nodal Roots in Tropical Upland and Lowland Rice Varieties |
title_full_unstemmed |
Anatomy of Nodal Roots in Tropical Upland and Lowland Rice Varieties |
title_sort |
anatomy of nodal roots in tropical upland and lowland rice varieties |
publisher |
Taylor & Francis Group |
series |
Plant Production Science |
issn |
1343-943X 1349-1008 |
publishDate |
2000-01-01 |
description |
Nodal root anatomy was compared among twelve upland and lowland rice (Oryza sative L.) varieties with tropical origin which were grown in hydroponic culture and under field conditions. The traditional upland japonica varieties showed the largest diameter of root, stele, and xylem vessel followed by modern upland varieties. There was a clear varietal difference in the ratio of stele to root diameter, which was associated with the genetic group rather than with the ecosystems. The japonica varieties had a significantly larger stele diameter relative to the root diameter than indica and aus varieties. The indica and aus varieties displayed more xylem vessels per unit area of stele than the japonica varieties, but the diameter of xylem vessel was smaller. Equivalent xylem vessel diameter (De) was more dependent on the number of xylem in the indica varieties than in the japonica varieties. Distinctly different types of sclerenchyma anatomy were identified among the varieties. The development of sclerenchyma was classified into four different types based on thickening of cell wall in the outer cortical parenchyma and the number of sclerenchymatous cell layers. Like the xylem anatomy, the varietal differences in sclerenchyma development were more associated with genetic group rather than the ecotype. The japonica varieties had higher frequency of the types which have a doubled cell layer in sclerenchyma with thick cell wall than indica and aus. The difference among the genetic groups was nearly consistent across growing conditions, aerobic and submerged soils. These results indicated that sclerenchyma development is controlled by a genetic factor. |
topic |
Nodal root Sclerenchyma Upland rice Xylem vessel |
url |
http://dx.doi.org/10.1626/pps.3.437 |
work_keys_str_mv |
AT motohikokondo anatomyofnodalrootsintropicaluplandandlowlandricevarieties AT albertaguilar anatomyofnodalrootsintropicaluplandandlowlandricevarieties AT junabe anatomyofnodalrootsintropicaluplandandlowlandricevarieties AT shigenorimorita anatomyofnodalrootsintropicaluplandandlowlandricevarieties |
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1725429412112891904 |