The roles and interactions of phytohormones and sugars in shoot branching

2021 ◽  
Author(s):  
◽  
Da Cao
Keyword(s):  
Shoot Branching

scholarly journals Novel QTL Associated with Shoot Branching Identified in Doubled Haploid Rice (Oryza sativa L.) under Low Nitrogen Cultivation

Genes ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 745
Author(s):  
Youngho Kwon ◽  
Nkulu Rolly Kabange ◽  
Ji-Yun Lee ◽  
So-Myeong Lee ◽  
Jin-Kyung Cha ◽  
...  
Keyword(s):  
Doubled Haploid ◽  
Phenotypic Variation ◽  
Growth And Development ◽  
Oryza Sativa L ◽  
Tiller Number ◽  
Yield Potential ◽  
Doubled Haploid Population ◽  
Shoot Branching ◽  
Normal Nitrogen ◽  
Low Nitrogen

Shoot branching is considered as an important trait for the architecture of plants and contributes to their growth and productivity. In cereal crops, such as rice, shoot branching is controlled by many factors, including phytohormones signaling networks, operating either in synergy or antagonizing each other. In rice, shoot branching indicates the ability to produce more tillers that are essential for achieving high productivity and yield potential. In the present study, we evaluated the growth and development, and yield components of a doubled haploid population derived from a cross between 93-11 (P1, indica) and Milyang352 (P2, japonica), grown under normal nitrogen and low nitrogen cultivation open field conditions. The results of the phenotypic evaluation indicated that parental lines 93-11 (P1, a high tillering indica cultivar) and Milyang352 (P2, a low tillering japonica cultivar) showed distinctive phenotypic responses, also reflected in their derived population. In addition, the linkage mapping and quantitative trait locus (QTL) analysis detected three QTLs associated with tiller number on chromosome 2 (qTNN2-1, 130 cM, logarithm of the odds (LOD) 4.14, PVE 14.5%; and qTNL2-1, 134 cM, LOD: 6.05, PVE: 20.5%) and chromosome 4 (qTN4-1, 134 cM, LOD 3.92, PVE 14.5%), with qTNL2-1 having the highest phenotypic variation explained, and the only QTL associated with tiller number under low nitrogen cultivation conditions, using Kompetitive Allele-Specific PCR (KASP) and Fluidigm markers. The additive effect (1.81) of qTNL2-1 indicates that the allele from 93-11 (P1) contributed to the observed phenotypic variation for tiller number under low nitrogen cultivation. The breakthrough is that the majority of the candidate genes harbored by the QTLs qTNL2-1 and qTNN4-1 (here associated with the control of shoot branching under low and normal nitrogen cultivation, respectively), were also proposed to be involved in plant stress signaling or response mechanisms, with regard to their annotations and previous reports. Therefore, put together, these results would suggest that a possible crosstalk exists between the control of plant growth and development and the stress response in rice.

Integration of the SMXL/D53 strigolactone signalling repressors in the model of shoot branching regulation in Pisum sativum

2021 ◽  
Author(s):  
Stephanie C. Kerr ◽  
Suyash Patil ◽  
Alexandre de Saint Germain ◽  
Jean‐Paul Pillot ◽  
Julie Saffar ◽  
...  
Keyword(s):  
Pisum Sativum ◽  
Shoot Branching ◽  
Strigolactone Signalling

Arabidopsis SMAX1 overaccumulation suppresses rosette shoot branching and promotes leaf and petiole elongation

2021 ◽  
Vol 553 ◽  
pp. 44-50
Author(s):  
Xiujuan Zheng ◽  
Xianfeng Yang ◽  
Zheng Chen ◽  
Wenjia Xie ◽  
Xinwu Yue ◽  
...  
Keyword(s):  
Shoot Branching ◽  
Petiole Elongation

SHOOT BRANCHING

2005 ◽  
Vol 56 (1) ◽  
pp. 353-374 ◽  
Author(s):  
Paula McSteen ◽  
Ottoline Leyser
Keyword(s):  
Shoot Branching

Grasses provide new insights into regulation of shoot branching

2013 ◽  
Vol 18 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Tesfamichael H. Kebrom ◽  
Wolfgang Spielmeyer ◽  
E. Jean Finnegan
Keyword(s):  
Shoot Branching
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