SBS Khumancha at 04:35, 31 December 2025

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{{short description|Indian phycologist}}
{{Infobox scientist
| name = Mandayam Osuri Parthasarathy Iyengar
| image = Madras Presidency College 1925.jpg
| image_size = 250px
| caption = M.O.P. Iyengar in 1925, first row, third from left
| birth_date = {{Birth date|1886|12|15|df=yes}}
| birth_place = [[Madras]], [[British India]] (now [[Chennai]], India)
| death_date = {{Death date and age|1963|12|10|1886|12|15|df=yes}}
| death_place =
| field = [[Phycology]], [[Botany]]
| work_institutions = [[Presidency College, Chennai]]<br>[[Madras University]]
| alma_mater = [[Presidency College, Chennai]]<br>[[Queen Mary College, London]]
| doctoral_advisor = [[Felix Eugen Fritsch]]
| doctoral_students =
| known_for = Pioneering algae research in India<br>Studies on [[Chlamydomonadales|Volvocales]]<br>First President of the [[Phycological Society of India]]
| author_abbrev_bot = Iyengar
| author_abbrev_zoo =
| awards =
}}

'''Mandayam Osuri Parthasarathy Iyengar''' (15 December 1886 – 10 December 1963) was a prominent Indian [[botanist]] and [[phycologist]] who researched the structure, cytology, reproduction and taxonomy of [[algae]]. He is known as the "father of Indian phycology" or "father of algology in India". He was the first President of [[Phycological Society of India]]. He primarily studied the [[Chlamydomonadales|Volvocales]]. He was the brother of [[M. O. T. Iyengar]].

== Biography ==
Iyengar was born in Madras where his father M.O. Alasingrachariar worked as an attorney. The wealthy family was known for achievements in many walks of lives. After studies at the Hindu High School, he went to Presidency College, obtaining a BA degree in 1906 and an MA in 1909. He then became a curator in the [[Government Museum, Chennai|Government Museum]] at [[Madras]] and became a lecturer in the Teacher's College in 1911. He became a professor of botany in the [[Presidency College, Chennai|Presidency College]] in 1920 and worked on algae aside from teaching. He worked in the UK in 1930 along with Professor [[Felix Eugen Fritsch|F.E. Fritsch]] at the [[Queen Mary University of London|Queen Mary College]] from where he received a PhD.<ref>{{cite journal| author=Subrahmanyan, R.|title=Professor M.O.P. Iyengar|url=http://mbai.org.in/uploads1/manuscripts/Article%2019%20(311-314)2025404837.pdf| journal=Journal of the Marine Biological Association of India |year=1963|pages=311–314|volume=5|issue=2}}</ref><ref>{{Cite journal|last=Desikachary|first=T. V.|date=2004|title=M O P Iyengar (1886–1963)|url=https://www.ias.ac.in/article/fulltext/jbsc/029/03/0225-0230|journal=Journal of Biosciences|language=en|volume=29|issue=3|pages=225–230|doi=10.1007/BF02702604|pmid=15381843|s2cid=29281342|issn=0250-5991|url-access=subscription}}</ref>

Iyengar was an active sportsman and swimmer. He rescued two of his students from drowning in the [[Pamban]] in 1925. He was also a billiards champion in Madras. He died from cerebral thrombosis.<ref>{{cite journal|doi=10.1038/202132b0|title=Prof. M. O. P. Iyengar|journal=Nature|volume=202|issue=4928|pages=132–133|year=1964|last1=Maheshwari|first1=P.|bibcode=1964Natur.202..132M|s2cid=5298773|doi-access=free}}</ref><ref name=":0">{{Cite journal|author=Desikachary, T. V. |year=1964|title= M. O. P. Iyengar (1886–1963)| journal= Phycologia|volume= 4| issue=1|pages= 54–61|doi=10.2216/i0031-8884-4-1-54.1}}</ref>

Several taxa have been named after him including ''Iyengaria'' <ref name=":0" />(Punctariaceae), ''Iyengarina'' (Dematiaceae), ''Iyengariella'' (Stigonemataceae), and ''Parthasarathiella'' (Stigonemataceae).

== Selected research papers ==
{{botanist|M.O.P.Iyengar}}

* {{cite journal |author=Iyengar, M. |year=1962 |title=''Euglena'' studies from Madras |journal=Archiv für Mikrobiologie |volume=42 |issue=3 |pages=322–332 |doi=10.1007/BF00422049 |s2cid=20631388 }}
* {{cite journal |author=Iyengar, M. |year=1973 |title=Contributions to our knowledge of South Indian algae. V. |journal=Proceedings of the Indian Academy of Sciences, Section B |volume=78 |issue=6 |pages=257–274 |doi=10.1007/BF03045606|s2cid=198141357 }}
* {{cite journal |author1=Iyengar, M. |author2=Ramanath, K. R. |year=1974 |title=Contributions to our knowledge of South Indian algae. VI. Sexual reproduction in ''Crucigenia lauterbornei'' Schmidle |journal=Proceedings of the Indian Academy of Sciences, Section B |volume=79 |issue=6 |pages=227–229 |doi=10.1007/BF03045453|s2cid=198139755 }}
* {{cite journal |author=Iyengar, M. |year=1974 |title=Contributions to our knowledge of South Indian algae. VII. |journal=Proceedings of the Indian Academy of Sciences, Section B |volume=79 |issue=6 |pages=236–250 |doi=10.1007/BF03045455|s2cid=198143324 }}
* {{cite journal |author=Iyengar, M. |year=1975 |title=Contributions to our knowledge of South Indian algae. VIII. |journal=Proceedings of the Indian Academy of Sciences, Section B |volume=81 |issue=1 |pages=29–60 |doi=10.1007/BF03050744|s2cid=198139654 }}
* {{cite journal |author1=Iyengar, M. |author2=Desikachary, T. |year=1976 |title=Contributions to our knowledge of South Indian algae. IX. |journal=Proceedings of the Indian Academy of Sciences, Section B |volume=84 |issue=5 |pages=159–164 |doi=10.1007/BF03045536|s2cid=130712627 }}
* {{cite journal |author=Iyengar, M. |title=Developmental stages of filariae in mosquitoes |journal=South Pacific Commission Technical Paper |volume=104 |year=1957}}

==References==
{{reflist}}

== External links ==
* [https://web.archive.org/web/20080312191544/http://www.unom.ac.in/guindybotony.html History of the ''Center of Advanced Studies in Botany'', From the official website of the University of Madras]
* [https://web.archive.org/web/20070515011337/http://www.uniraj.ernet.in/ibs-2004/sheet11.html Website of the Indian Botanical Society]

{{Authority control}}

{{DEFAULTSORT:Iyengar, Mandeyam Osuri Parthasarathy}}
[[Category:1886 births]]
[[Category:1963 deaths]]
[[Category:Indian phycologists]]
[[Category:20th-century Indian botanists]]
[[Category:Fellows of the Linnean Society of London]]

M. O. P. Iyengar - Revision history

SBS Khumancha at 04:35, 31 December 2025