The barrier to radial oxygen loss from roots of rice (Oryza sativa L.) is induced by growth in stagnant solution

Colmer, Timothy D.; Gibberd, Mark; Wiengweera, A.; Tinh, Tran Kim

doi:10.1093/jxb/49.325.1431

Cited by 173 publications

(92 citation statements)

References 28 publications

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“…2). Rice roots normally have porosity range of 30-40% for the whole root system when grown either directly under O 2 -defi cient (Colmer et al, 1998) or well-aerated then transferred to O 2 defi cient conditions (Colmer, 2003a;Insalud et al, 2006). The reported root porosity values in the previous studies were higher than the 10-20% average porosity on the seminal roots of Nipponbare and CSSL47 grown under D-S conditions in this study (Fig.…”

Section: Comparison Between D-s and S-d Conditionsmentioning

confidence: 47%

Utilizing Chromosome Segment Substitution Lines (CSSLs) for Evaluation of Root Responses to Transient Moisture Stresses in Rice

Suralta

Inukai

Yamauchi

2008

Plant Production Science

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Section: Comparison Between D-s and S-d Conditionsmentioning

confidence: 47%

Utilizing Chromosome Segment Substitution Lines (CSSLs) for Evaluation of Root Responses to Transient Moisture Stresses in Rice

Suralta

Inukai

Yamauchi

2008

Plant Production Science

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“…However, in root of rice, aerenchyma formation is constitutive type which takes place even in aerobic conditions (John 1977;Clark and Harris 1981), although the extent of aerenchyma formation is triggered by soil waterlogging (Das and Jat 1977;Justin and Armstrong 1991). Furthermore, studies on root aerenchyma formation in rice have also shown enhanced formation of aerenchyma, when O 2 deficiency was imposed in hydroponics (Colmer et al 1998;Colmer 2003a). Ethylene signalling had previously been implicated in enhanced aerenchyma formation in rice (Jackson et al 1985a) however, further studies cleared that aerenchyma formation in adventitious roots is not controlled by ethylene or hypoxia (Jackson et al 1985b).…”

Section: Soil Waterlogging and Aerenchyma Developmentmentioning

confidence: 99%

“…Besides this, there should be a sufficient hydraulic permeability for water uptake. Thus in rice, water uptake is hydraulic in nature and oxygen losses are diffusive (Colmer et al 1998). Some rice cultivars were found to allow oxygen diffusion from aerenchyma to outer surface of roots in order to keep the rhizosphere aerobic during anoxia (Briones et al 2002).…”

Section: Soil Waterlogging and Aerenchyma Developmentmentioning

confidence: 99%

Lysigenous aerenchyma formation involves non-apoptotic programmed cell death in rice (Oryza sativa L.) roots

Joshi

Kumar

2011

Physiol Mol Biol Plants

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In waterlogged soil, deficiency of oxygen triggers development of aerenchyma in roots which facilitates gas diffusion between roots and the aerial environment. However, in contrast to other monocots, roots of rice (Oryza sativa L.) constitutively form aerenchyma even in aerobic conditions. The formation of cortical aerenchyma in roots is thought to occur by either lysigeny or schizogeny. Schizogenous aerenchyma is developed without cortical cell death. However, lysigenous gas-spaces are formed as a consequence of senescence of specific cells in primary cortex followed by their death due to autolysis. In the last stage of aerenchyma formation, a 'spoked wheel' arrangement is observed in the cortical region of root. Ultrastructural studies show that cell death is constitutive and no characteristic cell structural differentiation takes place in the dying cells with respect to surrounding cells. Cell collapse initiation occurs in the center of the cortical tissues which are characterized by shorter with radically enlarged diameter. Then, cell death proceeds by acidification of cytoplasm followed by rupturing of plasma membrane, loss of cellular contents and cell wall degradation, while cells nuclei remain intact. Dying cells releases a signal through symplast which initiates cell death in neighboring cells. During early stages, middle lamella-degenerating enzymes are synthesized in the rough endoplasmic reticulum which are transported through dictyosome and discharged through plasmalemma beneath the cell wall. In rice several features of root aerenchyma formation are analogous to a gene regulated developmental process called programmed cell death (PCD), for instance, specific cortical cell death, obligate production of aerenchyma under environmental stresses and early changes in nuclear structure which includes clumping of chromatin, fragmentation, disruption of nuclear membrane and apparent engulfment by the vacuole. These processes are followed by crenulation of plasma membrane, formation of electron-lucent regions in the cytoplasm, tonoplast disintegration, organellar swelling and disruption, loss of cytoplasmic contents, and collapse of cell. Many processes in lysing cells are structural features of apoptosis, but certain characteristics of apoptosis i.e., pycnosis of the nucleus, plasma membrane blebbing, and apoptotic bodies formation are still lacking and thus classified as non-apoptotic PCD. This review article, describes most recent observations alike to PCD involved in aerenchyma formation and their systematic distributions in rice roots.

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“…In Oryza sativa (rice) and Hordeum marinum, suberin and/or lignin in the outer part of roots are thought to contribute to the barrier (Garthwaite et al 2008, Kotula et al 2009a, Kotula et al 2009b, Ranathunge et al 2011 can be detected ). These strategies for acclimating to waterlogged conditions are found in several wetland plants, including rice (Justin and Armstrong 1991, Colmer et al 1998, Colmer et al 2006, Rumex palustris (Visser et al 1995, Visser et al 2000 and H. marinum (Garthwaite et al 2003, Garthwaite et al 2008). However, other crops, such as wheat (McDonald et al 2001b), barley (Garthwaite et al 2003) and maize (Zea mays) (Drew et al 1979, Abiko et al 2012b, can form aerenchyma and newly formed roots, but cannot form an ROL barrier.…”

Section: Introductionmentioning

confidence: 99%

Waterlogging tolerance and capacity for oxygen transport in Brachypodium distachyon (Bd21)

Shiono

Yamada

2014

Plant Root

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Many crops are sensitive to waterlogging. A small, fast-growing grass, Brachypodium distachyon (Bd21), whose genome has been sequenced, is a new model for studying cereal crops such as wheat and barley, and for developing novel biomass grasses. However, its waterlogging tolerance and oxygen transport properties are not known. Here, we show that in stagnant deoxygenated nutrient solution, which mimics waterlogged soil, B. distachyon grows poorly and does not increase the number of newly formed roots. In both aerated and stagnant conditions, aerenchyma was hardly observed in roots, and root porosities were low. Suberin and lignin, which are thought to be constituents of the barrier to radial oxygen loss, did not develop in the outer part of roots in either aerated or stagnant conditions. Our results suggest that the abilities of oxygen transport in B. distachyon are insufficient to grow and survive in stagnant deoxygenated conditions.

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The barrier to radial oxygen loss from roots of rice (Oryza sativa L.) is induced by growth in stagnant solution

Cited by 173 publications

References 28 publications

Utilizing Chromosome Segment Substitution Lines (CSSLs) for Evaluation of Root Responses to Transient Moisture Stresses in Rice

Utilizing Chromosome Segment Substitution Lines (CSSLs) for Evaluation of Root Responses to Transient Moisture Stresses in Rice

Lysigenous aerenchyma formation involves non-apoptotic programmed cell death in rice (Oryza sativa L.) roots

Waterlogging tolerance and capacity for oxygen transport in Brachypodium distachyon (Bd21)

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