Phylum Cryptophyta & Prymnesiophyta

Phylum Cryptophyta describes tiny, motile, unicellular organisms with two slightly unequal flagella bearing lateral hairs. Prymnesiophyta are group of autotrophic, planktonic, binucleated flagellates characterized by the presence of a haptonema

1. Phylum Cryptophyt & Prymnesiophyta Presented by: Fasama Hilton Kollie Lecturer, Department of Biology Mother Patern College of Health Sciences February 28, 2019

2. Lesson Outline Overview of Phylum Cryptophyta Overview of the Phylum Prymnesiophyta

3. Lesson Objectives Upon completion of this lesson, students will be able to ; Describe the basic characteristics of cryptomonads and haptophytes

4. Phylum Cryptophyta: Cryptomonads Phylum Cryptophyta describes tiny, motile, unicellular organisms with two slightly unequal flagella bearing lateral hairs. Consist of about 200 species Other names: Cryptomonadales , Cryptophyceae , and Chromophyta

5. General Characteristics Chlorophyll a, c and phycobilin Found mainly both in freshwater and marine environment Generally they are photosynthetic Some heterotrophic and many Mixotrophic The cryptomonads are part of the nanoplankton

6. General Characteristics Cryptomonads also undergo algae bloom This occur commonly in ocean water near the poles and in other locations, including Chesapeake Bay Cryptomonads are biflagellate One flagella with long hairs on both side and the other with short hair on only one side

7. General Characteristics Inside the plasma membrane lies protein plates, Periplast ; membrane plus plate Contain chloroplast with chlorophyll a and c Phycobillin server as accessory pigment Combination of different pigments produce a range of colors from Yellow-Green to Blue, Red, or Brown

8. Cryptomonad

9. General Characteristics Ejectisomes serve as their characteristic feature It lines the cell periphery and the depression from which the flagella arise Ejectisomes uncoil rapidly when released propelling the cell in opposite direction

10. Reproduction Reproduction in cryptomonads is generally asexual in nature Sexual reproduction has been documented in some Cryptophytes

11. Phylum Prymnesiophyta Haptophytes

12. Phylum Prymnesiophyta: Haptophytes G roup of autotrophic, planktonic, binucleated flagellates characterized by the presence of a haptonema Consist of about 300 known species Most haptophytes occur as solitary motile or non-motile forms

13. General Characteristics Generally they are extremely small Each cell has two disk-shaped chloroplasts and a number of golden-yellow plastids Their cell surface is covered with small, flat scales in most species

14. Characteristics Cont’d… Their definitive characteristics is their Haptonema It’s a movable filament composed of three membranes surrounding seven microtubules Haptonema is situated b/w two whiplash flagella

15. Reference INTRODUCTION TO BOTANY, Nabors, Murray W., Copyright 2004 Pearson Education, Inc., publishing as Benjamin Cummings, 1301 Sansome St., San Francisco, CA 94111. www.aw-bc.com https://en.wikipedia.org/wiki/Cloud_condensation_nuclei

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