scholarly journals Osj10gBTF3-Mediated Import of Chloroplast Protein Is Essential for Pollen Development in Rice

2021 ◽  
Vol 12 ◽  
Author(s):  
Xue-jiao Liu ◽  
Jiaqi Sun ◽  
Yuqing Huang ◽  
Chao Li ◽  
Peng Zheng ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Transcription Factors ◽  
Plant Development ◽  
Pollen Development ◽  
Chloroplast Development ◽  
Membrane Channel ◽  
Chloroplast Import ◽  
Chloroplast Protein ◽  
Chloroplast Stroma

Chloroplasts are crucial organelles for the generation of fatty acids and starch required for plant development. Nascent polypeptide-associated complex (NAC) proteins have been implicated in development as transcription factors. However, their chaperone roles in chloroplasts and their relationship with pollen development in plants remain to be elucidated. Here, we demonstrated that Osj10gBTF3, a NAC protein, regulates pollen and chloroplast development in rice by coordinating with a Hsp90 family chaperone OsHSP82 to mediate chloroplast import. Knockout of Osj10gBTF3 affects pollen and chloroplast development and significantly reduces the accumulation of fertility-related chloroplast protein OsPPR676. Both Osj10gBTF3 and OsHSP82 interact with OsPPR676. Interestingly, the interaction between OsHSP82 and OsPPR676 is only found in the cytoplasm, while the interaction between Osj10gBTF3 and OsPPR676 also occurs inside the chloroplast. The chloroplast stroma chaperone OsCpn60 can also be co-precipitated with Osj10gBTF3, but not with OsHSP82. Further investigation indicates that Osj10gBTF3 enters the chloroplast stroma possibly through the inner chloroplast membrane channel protein Tic110 and then recruits OsCpn60 for the folding or assembly of OsPPR676. Our results reveal a chaperone role of Osj10gBTF3 in chloroplast import different from Hsp90 and provide a link between chloroplast transport and pollen development in rice.

scholarly journals Role Of WOX And KNOX Transcription Factors In Plant Development And Tumor Formation

2006 ◽  
Vol 4 (4) ◽  
pp. 3-9
Author(s):  
Maria A Osipova ◽  
Elena A Dolgikh ◽  
Ludmila A Lutova
Keyword(s):  
Cell Proliferation ◽  
Transcription Factor ◽  
Transcription Factors ◽  
Plant Development ◽  
Plant Hormones ◽  
Tumor Formation ◽  
Animal Tumor ◽  
The Common ◽  
Meristem Maintenance

Homeodomain-containing transcription factors are the important regulators of multicellular organism's development. Plant transcription factors WOX and KNOX play the key role in meristem maintenance, controlling cell proliferation and preventing differentiation. The precise mechanism of WOX and KNOX action hasn't been well studied, however these transcription factors were shown to play the important role in plant hormones homeostasis, cytokinins in particular. Plant transcription factors of KNOX group demonstrate the similarities in structure and are supposed have the common origin with animal transcription factors of MEIS group. This review describes WOX and KNOX transcription factor families, their interaction with plant hormones. The role of homeodomain-containing transcription factors in plant and animal tumor formation is discussed.

TCP transcription factors: architectures of plant form

2013 ◽  
Vol 4 (2) ◽  
pp. 111-127 ◽  
Author(s):  
Nora G. Uberti Manassero ◽  
Ivana L. Viola ◽  
Elina Welchen ◽  
Daniel H. Gonzalez
Keyword(s):  
Transcription Factors ◽  
Plant Development ◽  
Current Knowledge ◽  
Hormone Responses ◽  
Plant Form ◽  
Developmental Responses ◽  
Available Information ◽  
Dna Complex ◽  
Shed Light

AbstractAfter its initial definition in 1999, the TCP family of transcription factors has become the focus of a multiplicity of studies related with plant development at the cellular, organ, and tissue levels. Evidence has accumulated indicating that TCP transcription factors are the main regulators of plant form and architecture and constitute a tool through which evolution shapes plant diversity. The TCP transcription factors act in a multiplicity of pathways related with cell proliferation and hormone responses. In recent years, the molecular pathways of TCP protein action and biochemical studies on their mode of interaction with DNA have begun to shed light on their mechanism of action. However, the available information is fragmented and a unifying view of TCP protein action is lacking, as well as detailed structural studies of the TCP-DNA complex. Also important, the possible role of TCP proteins as integrators of plant developmental responses to the environment has deserved little attention. In this review, we summarize the current knowledge about the structure and functions of TCP transcription factors and analyze future perspectives for the study of the role of these proteins and their use to modify plant development.

Mesophyll conductance: the leaf corridors for photosynthesis

2020 ◽  
Vol 48 (2) ◽  
pp. 429-439 ◽  
Author(s):  
Jorge Gago ◽  
Danilo M. Daloso ◽  
Marc Carriquí ◽  
Miquel Nadal ◽  
Melanie Morales ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Current Knowledge ◽  
Main Role ◽  
Mesophyll Conductance ◽  
Future Studies ◽  
Cell Structures ◽  
Leaf Tissues ◽  
Change Framework ◽  
Chloroplast Stroma

Besides stomata, the photosynthetic CO2 pathway also involves the transport of CO2 from the sub-stomatal air spaces inside to the carboxylation sites in the chloroplast stroma, where Rubisco is located. This pathway is far to be a simple and direct way, formed by series of consecutive barriers that the CO2 should cross to be finally assimilated in photosynthesis, known as the mesophyll conductance (gm). Therefore, the gm reflects the pathway through different air, water and biophysical barriers within the leaf tissues and cell structures. Currently, it is known that gm can impose the same level of limitation (or even higher depending of the conditions) to photosynthesis than the wider known stomata or biochemistry. In this mini-review, we are focused on each of the gm determinants to summarize the current knowledge on the mechanisms driving gm from anatomical to metabolic and biochemical perspectives. Special attention deserve the latest studies demonstrating the importance of the molecular mechanisms driving anatomical traits as cell wall and the chloroplast surface exposed to the mesophyll airspaces (Sc/S) that significantly constrain gm. However, even considering these recent discoveries, still is poorly understood the mechanisms about signaling pathways linking the environment a/biotic stressors with gm responses. Thus, considering the main role of gm as a major driver of the CO2 availability at the carboxylation sites, future studies into these aspects will help us to understand photosynthesis responses in a global change framework.

The role of Forkhead Box O 3a (FoxO3a) Transcription Factors in the Pathogenesis of Pulmonary Fibrosis

Pneumologie ◽  
2012 ◽  
Vol 66 (06) ◽  
Author(s):  
HM Al-Tamari ◽  
M Eschenhagen ◽  
A Schmall ◽  
R Savai ◽  
HA Ghofrani ◽  
...  
Keyword(s):  
Transcription Factors ◽  
Pulmonary Fibrosis ◽  
Forkhead Box

Alcohol intake impairs glucose counterregulation during acute insulin-induced hypoglycemia in IDDM patients. Evidence for a critical role of free fatty acids

Diabetes ◽  
1993 ◽  
Vol 42 (11) ◽  
pp. 1626-1634 ◽  
Author(s):  
A. Avogaro ◽  
P. Beltramello ◽  
L. Gnudi ◽  
A. Maran ◽  
A. Valerio ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Alcohol Intake ◽  
Critical Role
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