scholarly journals Auxin‐mediated Aux/ IAA ‐ ARF ‐ HB signaling cascade regulates secondary xylem development in Populus

2019 ◽  
Vol 222 (2) ◽  
pp. 752-767 ◽  
Author(s):  
Changzheng Xu ◽  
Yun Shen ◽  
Fu He ◽  
Xiaokang Fu ◽  
Hong Yu ◽  
...  
Keyword(s):  
Secondary Xylem ◽  
Signaling Cascade ◽  
Xylem Development

scholarly journals Brassinosteroids promote parenchyma cell and secondary xylem development in sugar beet ( Beta vulgaris L.) root

Plant Direct ◽  
2021 ◽  
Vol 5 (10) ◽  
Author(s):  
Wei Wang ◽  
Yaqing Sun ◽  
Guolong Li ◽  
Shaoying Zhang
Keyword(s):  
Sugar Beet ◽  
Beta Vulgaris ◽  
Secondary Xylem ◽  
Parenchyma Cell ◽  
Xylem Development

Secondary xylem development in Arabidopsis : a model for wood formation

2002 ◽  
Vol 114 (4) ◽  
pp. 594-600 ◽  
Author(s):  
Nigel Chaffey ◽  
Ewa Cholewa ◽  
Sharon Regan ◽  
Björn Sundberg
Keyword(s):  
Secondary Xylem ◽  
Wood Formation ◽  
Xylem Development

scholarly journals A Small Guanosine Triphosphate Binding Protein PagRabE1b Promotes Xylem Development in Poplar

2021 ◽  
Vol 12 ◽  
Author(s):  
Ying-Li Liu ◽  
Li-Juan Wang ◽  
Yu Li ◽  
Ying-Hua Guo ◽  
Yuan Cao ◽  
...  
Keyword(s):  
Secondary Xylem ◽  
Rab Gtpases ◽  
Biological Processes ◽  
Flow Cytometry Analysis ◽  
Wild Type ◽  
Functional Identification ◽  
Guanosine Triphosphate ◽  
Positive Role ◽  
Xylem Development ◽  
Reverse Transcription Pcr

Rab GTPases are the subfamily of the small guanosine triphosphate (GTP)-binding proteins which participated in the regulation of various biological processes. Recent studies have found that plant Rabs play some specific functions. However, the functions of Rabs in xylem development in trees remain unclear. In this study, functional identification of PagRabE1b in Populus was performed. Quantitative reverse transcription PCR (qRT-PCR) results showed that PagRabE1b was highly accumulated in stems, especially in phloem and xylem tissues. Overexpression of PagRabE1b in poplar enhanced programmed cell death (PCD) and increased the growth rate and the secondary cell wall (SCW) thickness. Quantitative analysis of monosaccharide content showed that various monosaccharides were significantly increased in secondary xylem tissues of the overexpressed lines. Flow cytometry analysis revealed that the number of apoptotic cells in PagRabE1b-OE lines is more than a wild type (WT), which indicated that PagRabE1b may play an important role in PCD. Further studies showed that overexpression of PagRabE1b increased the expression level of genes involved in SCW biosynthesis, PCD, and autophagy. Collectively, the results suggest that PagRabE1b plays a positive role in promoting the xylem development of poplar.

Effects of Light Intensity on Early Periderm and Xylem Development in Pinusresinosa, Fraxinuspennsylvanica, and Robiniapseudoacacia

1972 ◽  
Vol 2 (3) ◽  
pp. 190-197 ◽  
Author(s):  
G. A. Borger ◽  
T. T. Kozlowski
Keyword(s):  
Seed Germination ◽  
Light Intensity ◽  
Secondary Xylem ◽  
Xylem Development

The influence of light intensity on development of the first periderm and xylem in seedlings of Pinusresinosa, Fraxinuspennsylvanica, and Robiniapseudoacacia up to 56 days after seed germination was studied. Dark-grown seedlings of all three species lacked periderm at the end of the experimental periods, emphasizing the essentiality of light for periderm development. P. resinosa seedlings grown for 56 days following germination at 70 ft-c (1 ft-c = 10.76 lm/m2) of light and R. pseudoacacia seedlings grown at 70 or 300 ft-c of light for 30 days following germination failed to develop periderm. Seedlings of F. pennsylvanica grown at 70, 300, 600 or 1200 ft-c of light for 30 days following germination developed periderm. Periderm increments did not differ in 56-day-old P. resinosa seedlings grown at 600 or 1200 ft-c or in 30-day-old F. pennsylvanica seedlings grown at 70 or 300 ft-c of light. Phellogen formed sooner and was more active in 30-day-old R. pseudoacacia seedlings grown at 1200 ft-c than in those grown at 600 ft-c. Time to periderm initiation decreased and phellem increment increased in 30-day-old F. pennsylvanica seedlings with each increase in light intensity from 300 to 1200 ft-c. Secondary xylem was absent in dark-grown seedlings of all three species and in P. resinosa and F. pennsylvanica seedlings grown at 70 ft-c of light. In other treatments xylem increment increased significantly with each increase in light intensity up to 1200 ft-c.

Exogenous gibberellin enhances secondary xylem development and lignification in carrot taproot

PROTOPLASMA ◽  
2016 ◽  
Vol 254 (2) ◽  
pp. 839-848 ◽  
Author(s):  
Guang-Long Wang ◽  
Feng Que ◽  
Zhi-Sheng Xu ◽  
Feng Wang ◽  
Ai-Sheng Xiong
Keyword(s):  
Secondary Xylem ◽  
Xylem Development ◽  
Exogenous Gibberellin
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