Cambial Anatomy and Annual Rhythm of Secondary Xylem Development in the Twigs ofAzadirachta indicaA. Juss. (Meliaceae) Growing in Different Forests of Gujarat State

2001 ◽  
Vol 14 (2-3) ◽  
pp. 115-127 ◽  
Author(s):  
Kishore S. Rajput ◽  
K. S. Rao
Keyword(s):  
Secondary Xylem ◽  
Gujarat State ◽  
Xylem Development ◽  
Annual Rhythm

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

STEM ANATOMY OF SOME SPECIES OF PASSIFLORA (PASSIFLORACEAE)

IAWA Journal ◽  
2016 ◽  
Vol 37 (3) ◽  
pp. 431-443 ◽  
Author(s):  
Kishore S. Rajput ◽  
Himansu Baijnath
Keyword(s):  
South Africa ◽  
Secondary Xylem ◽  
Stem Growth ◽  
Vascular Cambium ◽  
Stem Anatomy ◽  
Gujarat State ◽  
Growth Rings ◽  
Passiflora Edulis ◽  
Kwazulu Natal ◽  
Transverse View

The stem anatomy of Passiflora edulis, P. foetida, P. suberosa, P. subpeltata, and P. vesicaria was studied in samples collected in Durban (KwaZulu-Natal Province, South Africa) and Baroda (Vadodara, Gujarat State, India). Radial stem growth in all the species is realized by a single, bidirectional vascular cambium. However, unequal activity in small segments of the cambial cylinder results in a lobed stem outline in P. foetida var. ellisonii, and a furrowed xylem cylinder in P. edulis f. edulis and P. vesicaria var. vesicaria. In P. subpeltata and P. edulis f. flavicarpa the xylem remains cylindrical in outline. In all the species investigated, secondary xylem is diffuse-porous with growth rings indistinct or absent. In transverse view, vessels are round to oval with different diameter categories, including very narrow fibriform vessels intermixed. In P. edulis f. edulis, stems are lobed due to the unidirectional activity of the cambium in small segments. Rays are mostly both narrow (1–3-seriate) and wide (multiseriate). The latter often become aggregate at some distance from the pith.

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.

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