The Role Of The Cytoskeleton In Plant Cell Gravisensitivity

Plant cell gravisensitivity and adaptation to microgravity

“…; Masi ) underlie the influence of clinorotation on cortical MT spatial orientation (Kordyum et al . , ; Shevchenko et al . ; Kalinina ).…”

“…To elucidate whether simulated microgravity affects the spatial organisation of cortical microtubules (MT) in root cells not specialised to gravity perception, MT were visualised in different root growth zones of transgenic GFP-MAP4 A. thaliana seedlings grown in stationary conditions and under clinorotation with LSM 5 PASCAL, using an MT inhibitor (5 lM l À1 oryzalin; Kalinina 2008;Kordyum et al 2008a). In controls, cortical MT arrays were dense and predominantly transverse to the root long axis in the meristem and distal elongation zone (DEZ) and became oblique when rapid cell elongation ended.…”

“…); gravity perception results in the normal spatial orientation of plants, together with growth and vital activity (gravitropism, gravitaxis), while gravisensing applies to the structure and metabolic stability of cells in a gravitational field that are not specialized to graviperception and changes in microgravity (Kordyum & Guikema ; Kordyum et al . ,b).…”

A Journey Through Plant Cytoskeleton: Hot Spots in Signaling and Functioning

“…Among different aspects of plant cytoskeleton involvement into regulation of cellular and physiologic processes, a couple of them attract a special interest. Despite of long period of investigation, still a lot of questions remain unclear about molecular mechanisms of plant graviperception (Blancaflor, ; Kordyum et al, ). In the short review, Shevchenko () discusses how MT‐associated proteins regulate cortical MT arrays under mechanical stress and consider how these proteins may act as plant cell gravisensors.…”

An actin‐depolymerizing factor from the halophyte smooth cordgrass, Spartina alterniflora (SaADF2), is superior to its rice homolog (OsADF2) in conferring drought and salt tolerance when constitutively overexpressed in rice

“…The cytoskeleton is one of the most dynamic cellular components, which modulates its architecture by responding constantly to various environmental stimuli. In plants, cytoskeleton dynamics is critical for numerous cellular processes, such as cell division, morphogenesis, polarized cell expansion, root and pollen tube tip growth, cytoplasmic streaming/cyclosis (Menand et al, 2007;Pollard and Cooper, 2009), cell-to-cell communication through plasmodesmata (Higaki et al, 2008), perception of gravitropism (Kordyum et al, 2009;Stanga et al, 2009), regulation of cell shape (Smith and Oppenheimer, 2005), and in response to wounding, pathogen attack, hormone distribution and cold acclimation (Deng et al, 2010;Hussey et al, 2006;Staiger, 2000;Staiger and Blanchoin, 2006;Wasteneys and Galway, 2003).…”