scholarly journals (2770) Proposal to conserve the name Asparagus draco ( Dracaena draco ) with that spelling ( Asparagaceae: Nolinoidae )

Taxon ◽  
2020 ◽  
Vol 69 (5) ◽  
pp. 1112-1113
Author(s):  
P. Pablo Ferrer‐Gallego ◽  
Juan M. Martínez Labarga
Keyword(s):  
Dracaena Draco

Icogenin, a new cytotoxic steroidal saponin isolated from Dracaena draco

2004 ◽  
Vol 12 (16) ◽  
pp. 4423-4429 ◽  
Author(s):  
Juan C Hernández ◽  
Francisco León ◽  
José Quintana ◽  
Francisco Estévez ◽  
Jaime Bermejo
Keyword(s):  
Steroidal Saponin ◽  
Dracaena Draco

scholarly journals First Age-Estimation Model for Dracaena ombet and Dracaena draco subsp. caboverdeana

Forests ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 264 ◽  
Author(s):  
Klára Lengálová ◽  
Hana Kalivodová ◽  
Hana Habrová ◽  
Petr Maděra ◽  
Berihu Tesfamariam ◽  
...  
Keyword(s):  
Age Estimation ◽  
Input Data ◽  
Conservation Management ◽  
Management Strategies ◽  
Tree Height ◽  
Stem Height ◽  
Estimation Model ◽  
Breast Height ◽  
Dracaena Draco ◽  
Dracaena Ombet

Research Highlights: The first model for crown age estimation was developed for Dracaena ombet Heuglin ex Kotschy and Peyr. and D. draco subsp. caboverdeana Marrero Rodr. and R. Almeida. Background and Objectives: Dracaena species are monocotyledon trees without annual tree rings. Most arborescent dragon tree species are endangered; thus, it is important to determine the age structures of these populations for proper conservation management strategies, and for modelling of population trends. For these reasons, it is necessary to develop a methodology of crown age estimation. Materials and Methods: Field data were collected in the Desa’a Forest (Ethiopia) and in Santo Antão (Cape Verde Islands). Trees within each age class, as expressed by the number of branch orders, were measured. The diameter at breast height, tree height, stem height, number of branch orders, number of all leaf rosettes and number of flowering leaf rosettes within the crown were recorded for each sampled tree. The flowering probabilities were counted as input data for the model used. Results: The duration of the interval between flowering events was 5.23 years for D. ombet and 4.94 years for D. draco subsp. caboverdeana. The crown of the oldest tree of D. ombet with 18 branch orders was estimated to be 94.2 years old, and the crown of the oldest tree of D. draco subsp. caboverdeana with 22 branch orders was estimated to be 108.6 years old.

scholarly journals Aerial Root Structure and Its Significance for Function in Dracaena draco

2020 ◽  
Author(s):  
Joanna Jura-Morawiec ◽  
Pedro Monroy ◽  
Aguedo Marrero ◽  
Mirela Tulik
Keyword(s):  
Structural Organization ◽  
Root Structure ◽  
Gran Canaria ◽  
Dormant State ◽  
Exact Function ◽  
Aerial Roots ◽  
Parenchyma Cells ◽  
Response To Stress ◽  
The Subject ◽  
Dracaena Draco

Abstract The dragon tree, Dracaena draco, is a vulnerable species. In response to stress it forms aerial roots (AR). Although the exact function of these AR is unknown, it has been the subject of speculation on the basis of morphological observations. This study aims to investigate the structural organization of the D. draco AR compared to the background of the structure of its soil roots. The material was obtained from the collection of dragon trees growing at Jardín Botánico Canario "Viera y Clavijo" on Gran Canaria as well as from the plants obtained from the commercial nursery. Based on hand-cut sections and permanent preparations, we analysed (a) AR structure along its length encompassing the active and dormant state of the AR tip, as well as (b) the general structural organization of the soil roots (stem-borne, lateral and fine roots). We observed that AR are similar to the lateral soil roots in terms of the distribution of the primary and secondary tissues. AR are protected by rhizodermis and/or hypodermis which undergoes metacutization during the transition from the active to dormant state of the AR tip. Chloroplasts are present in cortical parenchyma cells along the entire length of the AR. The obtained anatomical findings are discussed in the context of the putative AR functions.

Phytochemical profiles and inhibitory effect on free radical-induced human erythrocyte damage of Dracaena draco leaf: A potential novel antioxidant agent

2011 ◽  
Vol 124 (3) ◽  
pp. 927-934 ◽  
Author(s):  
Rui P. Santos ◽  
Lídia S. Mendes ◽  
Branca M. Silva ◽  
Paula Guedes de Pinho ◽  
Patrícia Valentão ◽  
...  
Keyword(s):  
Free Radical ◽  
Human Erythrocyte ◽  
Inhibitory Effect ◽  
Antioxidant Agent ◽  
Dracaena Draco ◽  
Phytochemical Profiles

scholarly journals Unraveling the Seed Dispersal System of an Insular “Ghost” Dragon Tree (Dracaena draco) in the Wild

2019 ◽  
Vol 7 ◽  
Author(s):  
Aarón González-Castro ◽  
David Pérez-Pérez ◽  
Javier Romero ◽  
Manuel Nogales
Keyword(s):  
Seed Dispersal ◽  
In The Wild ◽  
Dracaena Draco

Steroidal saponins from the aerial parts of Dracaena draco and their cytostatic activity on HL-60 cells

1999 ◽  
Vol 50 (5) ◽  
pp. 805-813 ◽  
Author(s):  
Yoshihiro Mimaki ◽  
Minpei Kuroda ◽  
Atsushi Ide ◽  
Aiko Kameyama ◽  
Akihito Yokosuka ◽  
...  
Keyword(s):  
Cytostatic Activity ◽  
Steroidal Saponins ◽  
Aerial Parts ◽  
Dracaena Draco

scholarly journals In Vitro Propagation and Acclimatization of Dragon Tree (Dracaena draco)

Horticulturae ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. 64 ◽  
Author(s):  
Alexis Galus ◽  
Ali Chenari Bouket ◽  
Lassaad Belbahri
Keyword(s):  
Root Induction ◽  
Shoot Induction ◽  
Endangered Tree ◽  
Successful Recovery ◽  
Bud Induction ◽  
Dormant Bud ◽  
One Year ◽  
Dracaena Draco ◽  
Effects Of Media

In this study, an efficient in vitro procedure was developed for bud induction, rooting of developing shoots and greenhouse acclimatization of young plantlets of dragon tree (Dracaena draco). Effects of media (S1 (1 mg/L KIN and 1 mg/L NAA), S2 (3 mg/L KIN and 1 mg/L IAA), S3 (1 mg/L BAP and 2 mg/L IBA) and S4 (1 mg/L BAP and 1 mg/L NAA)) on shoot induction and media (R1 (0 mg/L IBA), R2 (0.5 mg/L IBA), R3 (1 mg/L IBA), and R4 (2 mg/L IBA)) on root induction were examined in order to find optimal plant hormone concentrations for efficient Dracaena draco dormant bud development and subsequent rooting. The best shoot induction and rooting media were S1 and S2, and R3 and R4, respectively. Dormant buds from one-year-old Dracaena draco plants submitted to this in vitro procedure allowed successful recovery of up to 8 individuals per explant used. In vitro grown plants were successfully acclimated in the greenhouse. The potential of this in vitro procedure for multiplication of this endangered tree is discussed in this report.

Sign in / Sign up

Export Citation Format

Share Document