A Cotton Annexin Affects Fiber Elongation and Secondary Cell Wall Biosynthesis Associated with Ca²⁺ Influx, ROS Homeostasis, and Actin Filament Reorganization

Role of GhHDA5 in H3K9 deacetylation and fiber initiation in Gossypium hirsutum

“…Reactive oxygen species (ROS) signaling plays an essential role in the cotton fiber development (Zhang et al ., , ). Thus, to understand the reasons for the altered fiber parameters in RNAi lines, the ROS level was examined.…”

“…The MYB25 (Wu et al ., ; Machado et al ., ), MYB25‐like (Walford et al ., ), sucrose synthase (Ruan et al ., ), GbPDF1 (Deng et al ., ), GhH2A12 (Hao et al ., ), IAA (Zhang et al ., ), GhMYB2 (Wang et al ., ), GhHD1 (Walford et al ., ), GhJAZ2 (Hu et al ., ), GhPIN3a (Zhang et al ., , ) and GhMML4 (Wu et al ., ;), etc. are some important regulators of fiber initiation; whereas the elongation‐related regulators include: GhFAnnxA (Zhang et al ., ), GhCaM7‐like (Cheng et al ., ), GhMYB109 (Pu et al ., ), GhPK6 (Zhang and Liu, ), GhHOX3 (Shan et al ., ) and GhPRE1 (Zhao et al ., ), etc. in the cotton.…”

Recent Progress in Understanding the Role of Reactive Oxygen Species in Plant Cell Signaling

“…In addition, RBOH controls systemic signaling waves between the different plant organs in response to light and salinity stress (Evans et al, 2016;Gilroy et al, 2016). RBOH-dependent release of ROS was also found to modulate fiber growth in cotton (Gossypium hirsutum; Zhang et al, 2016) and peroxule outgrowth from peroxisomes (Rodriguez-Serrano et al, 2016). Furthermore, the meta-analysis of ROS-linked transcriptomes by Willems et al (2016) identified AtRBOHF as central component in ROS-dependent regulation.…”

“…Both dyes provided preliminary indications for ROS accumulation, but in most cases, more sensitive and less invasive probes should be used nowadays. Thus, the majority of studies presented in this Focus Issue employed fluorescein-based probes such as the 1 O 2 sensory fluorescein anthracene Singlet Oxygen Sensor Green (Koh et al, 2016) or the H 2 O 2 probe OxyBurst Green (29,79-dichlorodihydrofluorescein diacetate; Evans et al, 2016;Zhang et al, 2016). These newer probes offer sensitive and more reliable readouts but are difficult to apply to some tissues like leaves, and their specificity is still disputed (Winterbourn, 2014).…”

Overexpression of GhFIM2 propels cotton fiber development by enhancing actin bundle formation

“…Growing evidence demonstrates that cell elongation and secondary wall synthesis are associated with the dynamic reorganization of both actin cytoskeleton and microtubules in developing cotton fibers (Quader et al ; Seagull ; Wang et al ; Han et al ; Thyssen et al ). A number of cytoskeletal genes were found to express preferentially in fiber cells, and some of them were shown to function in the regulation of fiber development (Li et al ; Wang et al ; Wang et al ; Han et al ; Zhang et al ). Moreover, the dynamic restructuring of the actin cytoskeleton and microtubules was found to be critical for progression of the developmental stages in fiber cells (Wang et al ) ∧.…”