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186155

Chromosomal Studies on the Taxonomy of some Species of the Genus Aloe

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Last updated: 22 Jan 2023

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Abstract


The aim of this study was to analyze the karyotype by using root tips of three species of the Aloe genus namely Aloe sabaea, A. shadensis, and A. castellorum and to differentiate between them from the view point of chromosomes taxonomy. In addition, the study aimed at determining the DNA concentration for the three species. Chromosome number of these three species was 2n = 14. It consisted of four pairs of large sub telocentric chromosomes and three pairs of relatively small sub metacentric chromosomes. The presence of a secondary constriction was clearly visible positioned in the distal end of the long arm of the second chromosome pair in A. shadensis, and on the long arm of the first chromosome pair in A. castellorum, but not observed in A. sabaea. Chromosomes length, arm ration, the relative length, and the total chromatin length were calculated. The length of the chromosome complement already indicated that the species of Aloes possess a large genome. The DNA concentrations were determined through spectrophotometer measurements, they were 3.46, 5.58, and 4.41 μg/ml in A. sabaea, A. shadensis, and A. castellorum, respectively. These significant variations in the DNA concentrations along with the observed differences in the Karyotypes would strongly support the species status of each one of them and support their current recognized taxonomic status.

DOI

10.21608/jhiph.2004.186155

Keywords

Chromosomal Studies, Taxonomy, Species of the Genus Aloe

Authors

First Name

N

Last Name

Baeshin

MiddleName

A.

Affiliation

Department of Biology, Faculty of Sciences, King Abdulaziz University, Saudi Arabia

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First Name

N

Last Name

Al-Tawaty

MiddleName

H.

Affiliation

Department of Biology, Faculty of Sciences, King Abdulaziz University, Saudi Arabia

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City

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Orcid

-

First Name

E

Last Name

Ahmed

MiddleName

S.

Affiliation

Department of Biology, National Research Center, Cairo, Egypt

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City

-

Orcid

-

First Name

M

Last Name

Sibie

MiddleName

M.

Affiliation

Department of Biology, Faculty of Sciences, King Abdulaziz University, Saudi Arabia

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Orcid

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Volume

34

Article Issue

3

Related Issue

26792

Issue Date

2004-07-01

Receive Date

2021-07-28

Publish Date

2004-07-01

Page Start

509

Page End

516

Print ISSN

2357-0601

Online ISSN

2357-061X

Link

https://jhiphalexu.journals.ekb.eg/article_186155.html

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https://jhiphalexu.journals.ekb.eg/service?article_code=186155

Order

2

Type

Original Article

Type Code

511

Publication Type

Journal

Publication Title

Journal of High Institute of Public Health

Publication Link

https://jhiphalexu.journals.ekb.eg/

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Article

Created At

22 Jan 2023