Acid-Growth Response and α-Expansins in Suspension Cultures of Bright Yellow 2 Tobacco

Link, Bruce M.; Cosgrove, Daniel J.

doi:10.1104/pp.118.3.907

Cited by 109 publications

(99 citation statements)

References 30 publications

(42 reference statements)

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“…GmEXP1 showed strong sequence similarities to a group of ␣-expansins including NtEXP3 of tobacco (86%; Link and Cosgrove, 1998), CsEXP2 of cucumber (Cucumis sativus; 92%; Shcherban et al, 1995), OsEXP1 of rice (85%; Cho and Kende, 1997b), and AtEXP1 of Arabidopsis (82%; Shcherban et al, 1995). GmEXP2 also exhibited strong similarity to other ␣-expansins, such as PsEXP1 of pea (Pisum sativum; 82%; Michael, 1996), AtEXP6 of Arabidopsis (77%; Shcherban et al, 1995), and OsEXP4 of rice (71%; Cho and Kende, 1997b).…”

Section: Isolation Of Expansin Cdnas From a Root Cdna Library Of Soybeanmentioning

confidence: 99%

“…Expansin genes generally consist of a multigene family in various plant species (Shcherban et al, 1995;Cho and Kende, 1997b;Link and Cosgrove, 1998). Hence we performed genomic DNA gel-blot analyses to estimate the number of expansin genes in the soybean genome.…”

Section: The Gmexp1 and Gmexp2 Genes Are Members Of The Expansin Multmentioning

confidence: 99%

“…Li et al (2002) have recently classified the expansins into the ␣-, ␤-, and ␥-expansin subfamilies based on their phylogenetic relationship. Link and Cosgrove (1998) have also previously classified the ␣-expansin subfamily into four groups. Our phylogenetic analysis indicated that GmEXP1 belongs to the D group, which includes NtEXP3 (Link and Cosgrove, 1998), OsEXP1 (Cho and Kende, 1997b), and CsEXP2 (Shcherban et al, 1995), whereas GmEXP2 belongs to the A group, which includes AtEXP6 (Shcherban et al, 1995), PsEXP1 (Michael, 1996), and LeEXP18 (Reinhardt et al, 1998; see supplement data available at http://www.plantphysiol.org).…”

Section: The Gmexp1 and Gmexp2 Genes Are New Members Of The ␣-Expansimentioning

confidence: 99%

“…Link and Cosgrove (1998) have also previously classified the ␣-expansin subfamily into four groups. Our phylogenetic analysis indicated that GmEXP1 belongs to the D group, which includes NtEXP3 (Link and Cosgrove, 1998), OsEXP1 (Cho and Kende, 1997b), and CsEXP2 (Shcherban et al, 1995), whereas GmEXP2 belongs to the A group, which includes AtEXP6 (Shcherban et al, 1995), PsEXP1 (Michael, 1996), and LeEXP18 (Reinhardt et al, 1998; see supplement data available at http://www.plantphysiol.org). The high sequence conservation among various expansins from monocotyledonous and dicotyledonous plants, such as rice, cucumber, Arabidopsis, pea, and soybean, may support several important points: (a) The expansin gene family has arisen by gene duplication before the evolutionary divergence of monocotyledonous and dicotyledonous plants some 150 million years ago; (b) expansin proteins have strict functional constraints that limit the structural modifications while possibly maintaining functions; and (c) their functions are important to the normal development and physiology of angiosperms (Shcherban et al, 1995).…”

Section: The Gmexp1 and Gmexp2 Genes Are New Members Of The ␣-Expansimentioning

confidence: 99%

“…The ␣-expansins compose a major portion of the expansins, including the ones from tomato (Lycopersicon esculentum; Keller and Cosgrove, 1995), rice (Oryza sativa; Cho and Kende, 1997a), oat (Avena sativa; , and Arabidopsis (Cosgrove, 1998;Li et al, 2002). The ␣-expansin subfamily can be further divided into A, B, C, and D groups, as suggested by Link and Cosgrove (1998).…”

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Expression of an Expansin Gene Is Correlated with Root Elongation in Soybean

et al. 2003

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Expansin is a family of proteins that catalyze long-term expansion of cell walls and has been considered a principal protein that affects cell expansion in plants. We have identified the first root-specific expansin gene in soybean (Glycine max), GmEXP1, which may be responsible for root elongation. Expression levels of GmEXP1 were very high in the roots of 1-to 5-d-old seedlings, in which rapid root elongation takes place. Furthermore, GmEXP1 mRNA was most abundant in the root tip region, where cell elongation occurs, but scarce in the region of maturation, where cell elongation ceases, implying that its expression is closely related to root development processes. In situ hybridization showed that GmEXP1 transcripts were preferentially present in the epidermal cells and underlying cell layers in the root tip of the primary and secondary roots. Ectopic expression of GmEXP1 accelerated the root growth of transgenic tobacco (Nicotiana tabacum) seedlings, and the roots showed insensitivity to obstacle-touching stress. These results imply that the GmEXP1 gene plays an important role in root development in soybean, especially in the elongation and/or initiation of the primary and secondary roots.The root is a plant organ that has adapted to acquire water and nutrients from the environment (Schiefelbein et al., 1997). The root system has recently been the focus of interest as a useful system for understanding organ development because it is a relatively simple organ, its growth pattern is uniform, and it has a small number of differentiated cell types (Aeschbacher et al., 1994). Furthermore, the development of new roots (secondary or lateral roots) from an existing root (primary root) provides a novel opportunity to investigate cellular differentiation and development in plants.Although the primary and secondary roots share many basic structural features, they are different in their origin (Scheres et al., 1996). A basic feature of the root is its radial pattern, which is made up of concentric layers of tissues. Three fundamental types of the tissues are the epidermis, the cortex, and the vascular tissues (Esau, 1977;Dolan et al., 1993;Raven et al., 1999). In the longitudinal section, the root can be divided into three different regions: those of cell division, elongation, and maturation (specialization) (Dolan et al., 1993;Baluska et al., 1996;Howell, 1998;Raven et al., 1999). The region of cell division contains the root apical meristem, which carries out new cell divisions but does not elongate newly divided cells immediately. The cells derived from the region of cell division expand and elongate mostly in the region of elongation. After they have elongated, the cells begin to differentiate in the region of maturation, where root hairs and the secondary roots are initiated. The events of cell elongation and maturation occurring in the root have been suggested to be controlled by the extensibility of the cell wall and the turgor pressure inside the cell (Cosgrove, 1996).It has been proposed that development of the s...

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Section: Isolation Of Expansin Cdnas From a Root Cdna Library Of Soybeanmentioning

confidence: 99%

Section: The Gmexp1 and Gmexp2 Genes Are Members Of The Expansin Multmentioning

confidence: 99%

Section: The Gmexp1 and Gmexp2 Genes Are New Members Of The ␣-Expansimentioning

confidence: 99%

Section: The Gmexp1 and Gmexp2 Genes Are New Members Of The ␣-Expansimentioning

confidence: 99%

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confidence: 99%

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Expression of an Expansin Gene Is Correlated with Root Elongation in Soybean

et al. 2003

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Bio‐Tribology and Bio‐Lubrication of Plant Cell Walls

Dolan

Yakubov

Stokes

2018

Annual Plant Reviews Online

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This article considers the underpinning role of interactive forces at the cell wall and cellulose–fibre interfaces in the physiological and biophysical functionality of the various non‐cellulosic components that are present within the plant cell walls. We specifically introduce the use of tribological science (friction and lubrication) to obtain new insights into relative movements occurring between cells and between cellulose fibrils within the cell walls, and the potential influence on friction forces by pectin, hemicelluloses, and expansins. This approach may provide a basis for describing physical phenomena which define the system's behaviour during growth, morphogenesis, and mechanical deformation of plants.

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Expansins

McQueen‐Mason¹,

Le²,

Brocklehurst³

The Expanding Cell

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Acid-Growth Response and α-Expansins in Suspension Cultures of Bright Yellow 2 Tobacco

Cited by 109 publications

References 30 publications

Expression of an Expansin Gene Is Correlated with Root Elongation in Soybean

Expression of an Expansin Gene Is Correlated with Root Elongation in Soybean

Bio‐Tribology and Bio‐Lubrication of Plant Cell Walls

Expansins

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