The nodulation and nyctinastic leaf movement is orchestrated by clock gene LHY in Medicago truncatula

2020 ◽  
Vol 62 (12) ◽  
pp. 1880-1895
Author(s):  
Yiming Kong ◽  
Lu Han ◽  
Xiu Liu ◽  
Hongfeng Wang ◽  
Lizhu Wen ◽  
...  
Keyword(s):  
Medicago Truncatula ◽  
Clock Gene ◽  
Leaf Movement

scholarly journals The plant circadian clock gene LHY influences Medicago truncatula nodulation

2021 ◽  
Author(s):  
Mingkee Achom ◽  
Proyash Roy ◽  
Beatriz Lagunas ◽  
Roxanna Bonyadi-Pour ◽  
Alonso Pardal ◽  
...  
Keyword(s):  
Circadian Clock ◽  
Medicago Truncatula ◽  
Clock Gene ◽  
Root Nodules ◽  
Temporal Expression ◽  
Plant Host ◽  
Rhythmic Expression ◽  
Regulatory Processes ◽  
Large Gene ◽  
Spatio Temporal

Legumes house nitrogen-fixing endosymbiotic rhizobia in specialized polyploid cells within root nodules, which are factories of metabolic activity. We discovered that the circadian clock-associated transcriptional factor LATE ELONGATED HYPOCOTYL (LHY) affects nodulation in Medicago truncatula. By carrying out expression analysis of transcripts over time in nodules we found that the clock enables coordinated control of metabolic and regulatory processes linked to nitrogen fixation. Rhythmic transcripts in root nodules include a subset of Nodule-specific Cysteine Rich peptides (NCRs) that have the LHY-bound conserved Evening Element in their promoters. Until now, studies have suggested that NCRs act to regulate bacteroid differentiation and keep the rhizobial population in check. However, these conclusions came from the study of a few members of this very large gene family that has complex diversified spatio-temporal expression. We suggest that rhythmic expression of NCRs may be important for temporal coordination of bacterial activity with the rhythms of the plant host, in order to ensure optimal symbiosis.

The geometry of the compound leaf plays a significant role in the leaf movement of Medicago truncatula modulated by mtdwarf4a

2021 ◽  
Author(s):  
Weiyue Zhao ◽  
Quanzi Bai ◽  
Baolin Zhao ◽  
Qing Wu ◽  
Chaoqun Wang ◽  
...  
Keyword(s):  
Medicago Truncatula ◽  
Significant Role ◽  
Leaf Movement ◽  
Compound Leaf

The chicken CLOCK gene maps to chromosome 4

2000 ◽  
Vol 31 (5) ◽  
pp. 344-344 ◽  
Author(s):  
M A Noakes ◽  
M T Campbell ◽  
B J Van Hest
Keyword(s):  
Clock Gene ◽  
Chromosome 4 ◽  
Gene Maps
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