Distribution, Development and Structure of Gum Ducts in Lannea coromandelica (Houtt.) Merril

Venkaiah, K.; Shah, J. J.

doi:10.1093/oxfordjournals.aob.a086781

Cited by 32 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…especially the secondary integrated ramifying duct system in the bark of the trunk. In Lannea coromandelica at some places radial ducts in the phloem rays are continuous with xylem ray ducts (VENKAIAH & SHAH 1984). A similar comparison between Pachycormus discolor (table 2) and Trichoscypha species (table 1), reveals that in Pachycormus discolor the first primary system is entirely absent, whereas the arrangement of the ducts in the two other systems is different from that in Trichoscypha.…”

Section: Discussionmentioning

confidence: 72%

“…Lannea coromandelica (Houtt.) Merril (VENKAIAH & SHAH 1984), an important gum yielding plant, and Pachycormus discolor (Bentham) Coville (GIBSON 1981), the elephant tree. A comparison between the reported presence ofgum ducts in Lannea coromandelica (table 2) and our findings concerning Trichoscypha species (table 1), shows that in the first mentioned species no ducts are reported in the cortex of the stem and the whole root; we did not investigate the phelloderm.…”

Section: Discussionmentioning

confidence: 99%

“…Later on several authors described within Anacardiaceae secretory ducts ofschizogenous, lysigenous and schizo-lysigenous origin depending on the plant organ YENNING 1948 s-I s-l Trichoscypha species investigated s-l, also I I s-l, also I and the considered species (see table 3). For some anacardiacean species it is suggested that the ducts which originate schizogenously, in a later stage become lysigenous because cells lining the duct swell, become mucilaginous, desintegrate and are freed from their neighbouring cells (SIECK 1895, VENKAIAH & SHAH 1984 as is likely the case in some tissues of Trichoscypha.…”

Section: Discussionmentioning

confidence: 99%

“…This may be dependent on the species or even within a species on the considered tissue (GIBSON 1981;VENKAIAH & SHAH 1984). Also the chemical nature of the deposits in secretory canals caused much discussion (FAHN 1979;FAHN & EVERT 1974).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Distribution and Development of Secretory Ducts in Trichoscypha (Anacardiaceae)

Outer

Veenendaal

1986

Acta Botanica Neerlandica

View full text Add to dashboard Cite

Distribution and development of three different secretory ducts systems were studied in leaves, stems and roots of several Trichoscypha species (Anacardiaceae) from west tropical Africa. One primary three-dimensional network occurs in the pith and the cortex of the stem and mesophyll of the leaves. A second primary system of mainly longitudinal orientated, hardly ramifying, secretory ducts is found in the metaphloem of leaves, stem and roots while a secondary three-dimensional system is detected in the secondary phloem ofleaves, stem and roots. In the stem and roots, the last system is continuous with the secondary xylem via horizontal secretory ducts in both secondary phloemand xylem rays. The three systems are separated from one another.Ducts initiate schizogenously and develop further lysigenously in the primary phloem of the root, in the secondary phloem of the stem and sometimes also in the wood rays. In other parts of the plant the ducts develop entirely lysigenously.

show abstract

Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distribution and Development of Secretory Ducts in Trichoscypha (Anacardiaceae)

Outer

Veenendaal

1986

Acta Botanica Neerlandica

View full text Add to dashboard Cite

show abstract

“…This gum is yellowish white colour in fresh and on drying becomes dark. Gum ducts are present in leaves, stems, and fruits and are most abundant in the bark of the stem [50]. The roots contain cluytyl ferulate; heartwood gives lanosterol; bark, dlepi-catechin, and (+)-leucocyanidin; flowers and leaves, ellagic acid, quercetin, and quercetin-3 arabinoside.…”

Section: Some Recently Investigated Natural Gums and Mucilagesmentioning

confidence: 99%

Recently Investigated Natural Gums and Mucilages as Pharmaceutical Excipients: An Overview

Choudhary¹,

Pawar²

2014

Journal of Pharmaceutics

108

View full text Add to dashboard Cite

Due to advances in drug delivery technology, currently, excipients are included in novel dosage forms to fulfil specific functions and in some cases they directly or indirectly influence the extent and/or rate of drug release and drug absorption. Recent trends towards use of plant based and natural products demand the replacement of synthetic additives with natural ones. Today, the whole world is increasingly interested in natural drugs and excipients. These natural materials have many advantages over synthetic ones as they are chemically inert, nontoxic, less expensive, biodegradable, and widely available. This review discusses majority of the plant-derived polymeric compounds (gums and mucilage's), their sources, chemical constituents, uses, and some recent investigations as excipients in novel drug delivery systems.

show abstract

Ontogeny of normal and traumatic gum-resin ducts inAilanthus excelsa ROXB

Venkaiah¹

1988

Feddes Repert

View full text Add to dashboard Cite

Distribution, Development and Structure of Gum Ducts in Lannea coromandelica (Houtt.) Merril

Cited by 32 publications

References 0 publications

Distribution and Development of Secretory Ducts in Trichoscypha (Anacardiaceae)

Distribution and Development of Secretory Ducts in Trichoscypha (Anacardiaceae)

Recently Investigated Natural Gums and Mucilages as Pharmaceutical Excipients: An Overview

Ontogeny of normal and traumatic gum-resin ducts inAilanthus excelsa ROXB

Contact Info

Product

Resources

About