Ultrastructure of ray parenchyma cells in the wood of Melia azedarach L. (Meliaceae)

Pandalai, R. C.; Nair, G. M.; Shah, J. J.

doi:10.1007/bf00392049

Cited by 3 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pattern of cell death, the process of differentiation, and the functions of P ray in Abies sachalinensis were investigated by Nakaba et al (2006). The vitality of P ray , the death of which was proposed to mark the conversion of sW into hW, was recorded by the cytological changes of the cytoskeleton, vacuoles, organelles, and storage materials (Nakaba et al 2008) as well as the cell wall (Pandalai et al 1985). However, the mechanisms of conversion of xylem cells during hW formation have not yet been completely clarified.…”

Section: Introductionmentioning

confidence: 99%

Lignification of ray parenchyma cells in the xylem of Pinus densiflora. Part I: Microscopic investigation by POM, UV microscopy, and TOF-SIMS

et al. 2014

View full text Add to dashboard Cite

The lignification process from sapwood (sW) to heartwood (hW) in ray parenchyma cells (P ray ) of Pinus densiflora has been analyzed by means of ultraviolet (UV) microscopy, acetyl bromide (CH 3 COBr) lignin determination, and time-of-flight secondary ion mass spectrometry (TOF-SIMS). The cell wall layers were localized by polarized optical microscopy (POM). POM revealed that P ray have almost no secondary wall in sW and have only the outer layer of secondary wall (S 1 ) in the transition zone (TZ) and hW. UV microscopic observations indicated that the secondary wall of P ray , which is in contact with ray tracheids (Tr ray ), begins to lignify in sW, while the secondary wall of P ray , which is not in contact with Tr ray , is partially lignified in the TZ. The secondary wall of both types of P ray is completely lignified in hW. The CH 3 COBr lignin content in sW is slightly lower than that in hW. In the TOF-SIMS measurements, the relative intensities of the secondary ions of guaiacyl-lignin (G-lignin) in the rays in sW are significantly lower than those in hW.

show abstract

Section: Introductionmentioning

confidence: 99%