Rooting Nodes of Deep Roots in Rice and Maize Grown in a Long Tube

Araki, Hideki; Iijima, Morio

doi:10.1626/pps.1.242

Cited by 23 publications

(27 citation statements)

References 19 publications

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“…In the tube experiments, data of roots shallower than 0.1 m were excluded from the results because the roots might have stopped growing immediately after emergence. There were axile roots whose first order lateral roots penetrated deeper than the parent root, as has been observed in rice and maize (Araki and Iijima, 1998). The morphological characteristics of these first order lateral roots such as root diameter and branching ability were similar to those of the axile roots emerging from nodes.…”

Section: Methodssupporting

confidence: 64%

“…Anaerobic stress to root gro~th probably did not occur in the soil columns except in soil layers exceeding a 1.8 m depth in the tubes. Relationships among the penetration resistance, water content, and bulk density of the soil in the control and compact have already been reported (Araki and Iijima, 1998).…”

Section: Physical Conditions Of Soilmentioning

confidence: 87%

“…The design of the experiments, such as container size, soil bulk density in the containers, procedures before and after sowing, and sampling methods, were the same as those in the earlier studies (Araki and Iijima, 1998;Araki et · al., 2000). In the tube experiment, the tubes· were 2 m long and 0.07 5 m in diameter for control treatment (referred to as "control"), and 1m long with the same diameter as in the control for the compacted soil treatment (referred to as "compact").…”

Section: Methodsmentioning

confidence: 99%

“…The tube and root box were perforated 22 mm in diameter at 0.3 m intervals from the soil surface in order to monitor the soil water content. Soil water content was measured approximately every seven days by the method previously reported (Araki and Iijima, 1998). After measuring the water content, an equivalent of I to 3% of the water content was applied to the tubes and root boxes to replace the water lost since the last water application.…”

Section: Methodsmentioning

confidence: 99%

“…We have considered that analysis of the ecolo-physiological characteristics of deep and shallow roots in monocotyledonous crops could elucidate one of the physiological mechanisms modulating the deep penetration of a root. First, we specified the rooting nodes of the deepest roots in upland rice and maize under various conditions (Araki and Iijima, 1998;Araki et al, 2000). Winter wheat has some decisive differences in its root system when it is compared to summer cereal crops such as rice and maize.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Deep Rooting in Winter Wheat: Rooting Nodes of Deep Roots in Two Cultivars with Deep and Shallow Root Systems

Araki

Iijima

2001

Plant Production Science

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Section: Methodssupporting

confidence: 64%

Section: Physical Conditions Of Soilmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Deep Rooting in Winter Wheat: Rooting Nodes of Deep Roots in Two Cultivars with Deep and Shallow Root Systems

Araki

Iijima

2001

Plant Production Science

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Phenotyping for Root Traits

Chen

Djalović

Rengel

2015

Phenomics in Crop Plants: Trends, Options and Limitations

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Root system architecture determines crop capacity to acquire water and nutrients in the dynamic and variable soil environment. Increasing attention is paid to searching for optimal root traits to improve resource uptake efficiency and adaptation to heterogeneous soil conditions. This chapter summarises genetic variability and plasticity in root traits relevant to increased efficiency of soil resource acquisition. Approaches available for high-throughput phenotyping of root architecture traits at both laboratory and field scales are critically assessed. The advent of several novel imaging technologies such as X-ray computed tomography coupled with image-analysing software packages offers a great opportunity to non-invasively assess root architecture and its interactions with soil environments. The use of three-dimensional structure-function simulation root models is complementary to phenotyping methods, providing assistance in the crop breeding programmes. We also discuss applications and limitations of these novel visualisation technologies in characterising root growth and the root-soil interactions.

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Stable isotope analysis of water extraction from subsoil in upland rice (Oryza sativa L.) as affected by drought and soil compaction

Araki

Iijima

2005

Plant Soil

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Water extraction from subsoil in upland rice (Oryza sativa L.) was examined as related to topsoil desiccation and subsoil compaction. The water extraction was observed by measurements of heavy water concentrations in transpiring plants. The plants were grown in pots that were filled with sandy soil and vertically compartmented into two columns. Heavy water was applied to the subsoil. Plants exposed to mild topsoil desiccation (−120 kPa in water potential) eventually increased water extraction from the subsoil and maintained photosynthetic rate and stomatal conductance at the wet condition level. The rates of the plants subjected to severely droughted topsoil (−190 kPa) were significantly lowered due to less water uptake from the subsoil. Subsoil compaction at bulk densities of 1.45 and 1.50 Mg m −3 inhibited increase of root length densities. Limited water extraction from the subsoil was insufficient to maintain plant productivity under drought conditions. Daily water uptake per unit of root length in the lower tube did not apparently increase even if water demand on the unit root length increased. When water to topsoil was completely withheld, water extraction from the subsoil gradually increased as the topsoil dried out. Plants that were watered and rewatered took up very little water from the subsoil. The extraction from the subsoil occurred only when water potential of the topsoil was below about −190 kPa.

show abstract

Rooting Nodes of Deep Roots in Rice and Maize Grown in a Long Tube

Cited by 23 publications

References 19 publications

Deep Rooting in Winter Wheat: Rooting Nodes of Deep Roots in Two Cultivars with Deep and Shallow Root Systems

Deep Rooting in Winter Wheat: Rooting Nodes of Deep Roots in Two Cultivars with Deep and Shallow Root Systems

Phenotyping for Root Traits

Stable isotope analysis of water extraction from subsoil in upland rice (Oryza sativa L.) as affected by drought and soil compaction

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