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Potential of leaf domatia as stable morphoanatomical marker of four local coffea species / by Michelle L. Combate.

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Indang, Cavite : Cavite State University- Main Campus, 2019.Description: xiii, 63 pages : illustrations ; 28 cmContent type:
  • text
Media type:
  • unmediated
Carrier type:
  • volume
Subject(s): DDC classification:
  • 633.73  C73 2019
Online resources: Production credits:
  • College of Arts and Sciences (CAS), Department of Biological Sciences
Abstract: COMBATE, MICHELLE L. Potential of Leaf Domatia As Stable Morpho- anatomical Marker of Four Local Coffea Species. Undergraduate Thesis. Bachelor of Science in Biology. Cavite State University, Indang, Cavite. June 2019. Adviser: Prof. Lloyd O. Balinado. Rubiaceae is a plant family that is known to possess small leaf cavities called domatia which are usually associated with beneficial mites or insects. However, less is known about the morphoanatomy of this structure in one of its member genera, the Coffea. This study was conducted to explore the potential of leaf domatia as stable morpho-anatomical marker of the four Coffea species in Cavite, namely: C. arabica, C. canephora, C. liberica, and C. liberica var. dewevrei. Specifically, it aimed to describe the leaf domatia of four local Coffea species based on morphology and anatomy, compare the documented leaf domatia characters among the four local Coffea species, compare the leaf domatia characters of C. arabica leaves collected from Cavite and Benguet, and establish an identification key for the four Coffea species using the morphological and anatomical characters of their leaf domatia. Leaves were examined morphologically in terms of domatium type, position, area, and distribution and anatomically in terms of occurrence of hairs, hair type, and hair position. Observations revealed that leaf domatia of the four Coffea species shared almost similar morphological characteristics. All species were dominated by pit domatia which were positioned along the midrib and junctions of secondary veins. These domatia are usually measured 1x1 mm/. Anatomically, all the four species exhibited the presence of trichomes. These hairs were of unicellular type. The sole difference that was recorded for the four Coffea species was the positioning of hairs in the domatium. This trait was utilised for the synthesis of a dichotomous key that would help in identifying these four Coffea species. C. arabica is characterised by having trichomes positioned outside the domatium, around or atop the site of entry. The trichomes of the leaf domatia of C. canephora, on the other hand, lined the adjacent epidermal tissue reaching the midrib. C. /iberica and C. liberica var. dewevrei both possessed trichomes within the domatium and around the domatial pore.
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Theses / Manuscripts Theses / Manuscripts Ladislao N. Diwa Memorial Library Theses Section Non-fiction 633.73 C73 2019 (Browse shelf(Opens below)) Link to resource Room use only T-8204 00079749

Thesis (Bachelor of Science in Biology major in General Biology) Cavite State University.

Includes bibliographical references.

College of Arts and Sciences (CAS), Department of Biological Sciences

COMBATE, MICHELLE L. Potential of Leaf Domatia As Stable Morpho- anatomical Marker of Four Local Coffea Species. Undergraduate Thesis. Bachelor of Science in Biology. Cavite State University, Indang, Cavite. June 2019. Adviser: Prof.
Lloyd O. Balinado.

Rubiaceae is a plant family that is known to possess small leaf cavities called domatia which are usually associated with beneficial mites or insects. However, less is known about the morphoanatomy of this structure in one of its member genera, the Coffea. This study was conducted to explore the potential of leaf domatia as stable morpho-anatomical marker of the four Coffea species in Cavite, namely: C. arabica, C. canephora, C. liberica, and C. liberica var. dewevrei. Specifically, it aimed to describe the leaf domatia of four local Coffea species based on morphology and anatomy, compare the documented leaf domatia characters among the four local Coffea species, compare the leaf domatia characters of C. arabica leaves collected from Cavite and Benguet, and establish an identification key for the four Coffea species using the morphological and anatomical characters of their leaf domatia.

Leaves were examined morphologically in terms of domatium type, position, area, and distribution and anatomically in terms of occurrence of hairs, hair type, and hair
position.

Observations revealed that leaf domatia of the four Coffea species shared almost similar morphological characteristics. All species were dominated by pit domatia which were positioned along the midrib and junctions of secondary veins. These domatia are usually measured 1x1 mm/. Anatomically, all the four species exhibited the presence of trichomes. These hairs were of unicellular type. The sole difference that was recorded for the four Coffea species was the positioning of hairs in the domatium. This trait was utilised for the synthesis of a dichotomous key that would help in identifying these four Coffea species. C. arabica is characterised by having trichomes positioned outside the domatium, around or atop the site of entry. The trichomes of the leaf domatia of C. canephora, on the other hand, lined the adjacent epidermal tissue reaching the midrib. C. /iberica and C. liberica var. dewevrei both possessed trichomes within the domatium and around the domatial pore.

Submitted to the University Library 07/04/2019 T-8204

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