Studies on Root System Formation in Rice Plants in a Paddy

Kawata, Shin-ichiro; Yamazaki, Koou; Ishihara, Kuni; Shibayama, Hirohiko; Lai, Kwan-Long

doi:10.1626/jcs.32.163

Cited by 50 publications

(24 citation statements)

References 3 publications

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“…The rice plant bears axile roots from a basal part (proximal roots) and an apical part (distal roots) in internodes (Kawata et al, 1963). The roots that emerged from the most basal phytomers in tillers (prophyll roots) could not be grouped into the two root types above.…”

Section: Relationship Between the Growth Angles And Diameters Of The mentioning

confidence: 99%

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Physiol-Morphological Analysis on Axile Root Growth in Upland Rice

Araki

Morita

Tatsumi

et al. 2002

Plant Production Science

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Section: Relationship Between the Growth Angles And Diameters Of The mentioning

confidence: 99%

“…The reiterative development of the organs allows the axile roots to be grouped by the timing of the emergence sampled in Exp. 1, according to the shootroot development theory (Kawata et al, 1963; reviewed by Harada and Yamazaki, 1993).…”

Section: Relationship Between the Growth Angles And Diameters Of The mentioning

confidence: 99%

Physiol-Morphological Analysis on Axile Root Growth in Upland Rice

Araki

Morita

Tatsumi

et al. 2002

Plant Production Science

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“…Rice (Oryza sativa L.) is a model cereal crop with seminal roots that die during the growing period [1]. Thus, lateral roots (LRs) and AR are the key determinants of nutrient and water use efficiency in rice.…”

Section: Introductionmentioning

confidence: 99%

Adventitious root formation in rice requires OsGNOM1 and is mediated by the OsPINs family

et al. 2009

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The fibrous root system in cereals comprises primarily adventitious roots (ARs), which play important roles in nutrient and water uptake. Current knowledge regarding the molecular mechanism underlying AR development is still limited. We report here the isolation of four rice (Oryza sativa L.) mutants, from different genetic backgrounds, all of which were defective in AR formation. These mutants exhibited reduced numbers of lateral roots (LRs) and partial loss of gravitropism. The mutants also displayed enhanced sensitivity to N-1-naphthylphthalamic acid, an inhibitor of polar auxin transport (PAT), indicating that the mutations affected auxin transport. Positional cloning using one of the four mutants revealed that it was caused by loss-of-function of a guanine nucleotide exchange factor for ADPribosylation factor (OsGNOM1). RT-PCR and analysis of promoter::GUS transgenic plants showed that OsGNOM1 is expressed in AR primordia, vascular tissues, LRs, root tips, leaves, anthers and lemma veins, with a distribution pattern similar to that of auxin. In addition, the expressions of OsPIN2, OsPIN5b and OsPIN9 were altered in the mutants. Taken together, these findings indicate that OsGNOM1 affects the formation of ARs through regulating PAT.

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“…The average rate of increase (increased CRP per one PALN) was 2.7 for CRP and 2.8 for emerged CRs, respectively. These values correspond to the numbers of CRP and emerged CRs in a 'shoot unit root' (Kawata et al, 1963(Kawata et al, , 1972) and a 'unit' (Nitta et al, 1992(Nitta et al, , 1996 of rice plant. They are much lower than the values in rice plants, whose average number of CRP and emerged CRs in cv.…”

Section: Anatomical Characteristics Of Crp Formationmentioning

confidence: 94%

“…Therefore, CRP including CRs were not classifi ed by the wellknown 'nodal root' (Fujii, 1961) and the 'shoot unit root' classifi cation (Kawata et al, 1963(Kawata et al, , 1972. Nemoto et al (1995) reported that the rice plant is characterized as layers of phytomers, which consist of nodes and internodes, and that the CRP are formed anywhere in each phytomer irrespective of the nodal and internodal positions.…”

Section: Anatomical Characteristics Of the Unelongated Stem With Crp mentioning

confidence: 99%