Lateral roots, in addition to adventitious roots, form a barrier to radial oxygen loss in Zea nicaraguensis and a chromosome segment introgression line in maize

2020 ◽  
Vol 229 (1) ◽  
pp. 94-105 ◽  
Author(s):  
Ole Pedersen ◽  
Yohei Nakayama ◽  
Hiroki Yasue ◽  
Yusuke Kurokawa ◽  
Hirokazu Takahashi ◽  
...  
Keyword(s):  
Adventitious Roots ◽  
Lateral Roots ◽  
Introgression Line ◽  
Chromosome Segment ◽  
Radial Oxygen Loss ◽  
Oxygen Loss

A lack of aerenchyma and high rates of radial oxygen loss from the root base contribute to the waterlogging intolerance of Brassica napus

1999 ◽  
Vol 26 (1) ◽  
pp. 87 ◽  
Author(s):  
L.A.C.J. Voesenek ◽  
W. Armstrong ◽  
G.M. Bögemann ◽  
T.D. Colmer ◽  
M.P. McDonald
Keyword(s):  
Brassica Napus ◽  
Lateral Roots ◽  
Biomass Accumulation ◽  
Radial Oxygen Loss ◽  
Low Oxygen ◽  
Root Porosity ◽  
Oxygen Loss ◽  
Basal Portion ◽  
Pre Treatment ◽  
Oxygen Profiles

The morphology and physiology of the response of two cultivars of Brassica napus to an anaerobic root medium was investigated. The cultivars Chikuzen and Topas showed a large reduction in growth rate when their roots were exposed to a de-oxygenated stagnant nutrient solution containing 0.1% w/v agar. Older seedlings (11 d old) were more sensitive to stagnant agar, expressed as biomass accumulation, than younger ones (5 d old). Brassica napus was characterized by a constitutively low root porosity (3–5%), typical for plant species with a low tolerance to waterlogging. A hypoxia pre- treatment (16 h; 2.25% O2) before exposure to de-oxygenated stagnant agar had no effect on the final number or length of lateral roots and adventitious roots. Brassica napus cv. Chikuzen is characterized by radial oxygen loss being most at the basal portion of the root, when a strong oxygen sink surrounds the root. Oxygen profiles through laterals of Brassica napus cv. Chikuzen show a typical pattern with low oxygen concentrations in the stele and somewhat higher levels in the cortex. Despite the continuum of intercellular air spaces in the root cortical tissue the lack of aerenchyma and therefore low rates of internal oxygen diffusion restricts root growth in anaerobic media and presumably contributes to the sensitivity of Brassica napus to waterlogging.

Spatial patterns of radial oxygen loss and nitrate net flux along adventitious roots of rice raised in aerated or stagnant solution

2002 ◽  
Vol 29 (12) ◽  
pp. 1475 ◽  
Author(s):  
Michael Rubinigg ◽  
Ineke Stulen ◽  
J. Theo M. Elzenga ◽  
Timothy D. Colmer
Keyword(s):  
Oryza Sativa ◽  
Nutrient Uptake ◽  
Spatial Patterns ◽  
Adventitious Roots ◽  
Oryza Sativa L ◽  
Radial Oxygen Loss ◽  
Oxygen Loss ◽  
Root Zones ◽  
Cell Layers ◽  
Net Flux

Roots of rice (Oryza sativa L.) grown in stagnant de-oxygenated solution contain a 'tight' barrier to radial oxygen loss (ROL) in basal zones, whereas roots of plants grown in aerated solution do not. It is generally accepted that the barrier to ROL involves anatomical modifications in the apoplast of cell layers exterior to the aerenchyma. A possible drawback of this adaptation is a reduced capacity for nutrient uptake. Whether or not induction of a barrier to ROL influences the capacity of adventitious roots of rice to take up NO3– was determined in the present study, using NO3–-selective microelectrodes. When transferred into O2-free root medium, ROL from positions at 30–50 mm behind the tip of adventitious roots of plants raised in stagnant solution was only 4–6% of the rate from roots of plants raised in aerated solution, indicating the barrier to ROL was induced by growth in stagnant solution. For plants transferred into aerobic nutrient solution containing 0.1 mM NO3–, net NO3– uptake by these root zones, with or without a barrier to ROL, was the same. It is concluded that induction of a barrier to ROL had no effect on the capacity of adventitious roots of rice to take up NO3– from aerobic solution.

scholarly journals Formation of a barrier to radial oxygen loss in L-type lateral roots of rice

Plant Root ◽  
2020 ◽  
Vol 14 (0) ◽  
pp. 33-41
Author(s):  
Siti Noorrohmah ◽  
Hirokazu Takahashi ◽  
Mikio Nakazono
Keyword(s):  
Lateral Roots ◽  
Radial Oxygen Loss ◽  
Oxygen Loss

Abscisic acid is required for exodermal suberization to form a barrier to radial oxygen loss in the adventitious roots of rice ( Oryza sativa )

2021 ◽  
Author(s):  
Katsuhiro Shiono ◽  
Marina Yoshikawa ◽  
Tino Kreszies ◽  
Sumiyo Yamada ◽  
Yuko Hojo ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Abscisic Acid ◽  
Adventitious Roots ◽  
Radial Oxygen Loss ◽  
Oxygen Loss

scholarly journals A major locus involved in the formation of the radial oxygen loss barrier in adventitious roots of teosinte Zea nicaraguensis is located on the short‐arm of chromosome 3

2017 ◽  
Vol 40 (2) ◽  
pp. 304-316 ◽  
Author(s):  
Kohtaro Watanabe ◽  
Hirokazu Takahashi ◽  
Saori Sato ◽  
Shunsaku Nishiuchi ◽  
Fumie Omori ◽  
...  
Keyword(s):  
Adventitious Roots ◽  
Chromosome 3 ◽  
Radial Oxygen Loss ◽  
Oxygen Loss ◽  
Major Locus
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