scholarly journals Studying Secondary Growth and Bast Fiber Development: The Hemp Hypocotyl Peeks behind the Wall

2016 ◽  
Vol 7 ◽  
Author(s):  
Marc Behr ◽  
Sylvain Legay ◽  
Eva Žižková ◽  
Václav Motyka ◽  
Petre I. Dobrev ◽  
...  
2019 ◽  
Vol 116 (37) ◽  
pp. 18710-18716 ◽  
Author(s):  
Ana Milhinhos ◽  
Francisco Vera-Sirera ◽  
Noel Blanco-Touriñán ◽  
Cristina Mari-Carmona ◽  
Àngela Carrió-Seguí ◽  
...  

In plants, secondary growth results in radial expansion of stems and roots, generating large amounts of biomass in the form of wood. Using genome-wide association studies (GWAS)-guided reverse genetics inArabidopsis thaliana, we discoveredSOBIR1/EVR, previously known to control plant immunoresponses and abscission, as a regulator of secondary growth. We present anatomical, genetic, and molecular evidence indicating that SOBIR1/EVR prevents the precocious differentiation of xylem fiber, a key cell type for wood development. SOBIR1/EVR acts through a mechanism that involves BREVIPEDICELLUS (BP) and ERECTA (ER), 2 proteins previously known to regulate xylem fiber development. We demonstrate that BP bindsSOBIR1/EVRpromoter and thatSOBIR1/EVRexpression is enhanced inbpmutants, suggesting a direct, negative regulation of BP overSOBIR1/EVRexpression. We show that SOBIR1/EVR physically interacts with ER and that defects caused by thesobir1/evrmutation are aggravated by mutatingER, indicating that SOBIR1/EVR and ERECTA act together in the control of the precocious formation of xylem fiber development.


BMC Genomics ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 919 ◽  
Author(s):  
Jie Chen ◽  
Zhihua Pei ◽  
Lunjin Dai ◽  
Bo Wang ◽  
Lijun Liu ◽  
...  

2003 ◽  
Vol 18 (3) ◽  
pp. 213-221 ◽  
Author(s):  
Tatyana A. Gorshkova ◽  
Vadim V. Sal'nikov ◽  
Svetlana B. Chemikosova ◽  
Marina V. Ageeva ◽  
Natalia V. Pavlencheva ◽  
...  

Fibers ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 20 ◽  
Author(s):  
Natalia Mokshina ◽  
Tatyana Chernova ◽  
Dmitry Galinousky ◽  
Oleg Gorshkov ◽  
Tatyana Gorshkova

Author(s):  
Minakshi Chaudhary ◽  
Yogesh Hase ◽  
Ashwini Punde ◽  
Pratibha Shinde ◽  
Ashish Waghmare ◽  
...  

: Thin films of PbS were prepared onto glass substrates by using a simple and cost effective CBD method. Influence of deposition time on structural, morphology and optical properties have been investigated systematically. The XRD analysis revealed that PbS films are polycrystalline with preferred orientation in (200) direction. Enhancement in crystallinity and PbS crystallite size has been observed with increase in deposition time. Formation of single phase PbS thin films has been further confirmed by Raman spectroscopy. The surface morphology analysis revealed the formation of prismatic and pebble-like PbS particles and with increase in deposition time these PbS particles are separated from each other without secondary growth. The data obtained from the EDX spectra shows the formation of high-quality but slightly sulfur rich PbS thin films over the entire range of deposition time studied. All films show increase in absorption with increase in deposition time and a strong absorption in the visible and sub-band gap regime of NIR range of the spectrum with red shift in band edge. The optical band gap shows decreasing trend, as deposition time increases but it is higher than the band gap of bulk PbS.


2016 ◽  
Vol 5 (04) ◽  
pp. 4958
Author(s):  
Dulal De

Hymenachne acutigluma (Steud.) Gilliland, a robust rhizomatous perennial grass spreads on moist and swampy land and also floating in water. Being a grass species, they do not have any cambium for secondary growth. A peculiarity in stem anatomy especially the spongy pith of secondary tissues found in absence of the cambium. The origin and development of the parenchymatous pith tissues has been investigated in the present study. Economically this spongy pith is of very much potent for its high absorbing and filtering capacity and also used as a good fodder.


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