Phytophthora: Perbedaan antara revisi

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| image = Prei papiervlekkenziekte Phytophthora porri on Allium porrum.jpg
| image_width = 250px
| image_caption = Serangan ''Phytophthora porri'' onpada leekdaun (''Allium[[bawang porrum'')prei|prei]]
| domain = [[Eukaryota]]
| regnum = [[Chromalveolata]]
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''lihat teks''
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<!-- [[File:SuddenOakDeath-USDA-Forest-Service.jpg|thumb|right|250px|Layu batang ek akibat serangan ''[[Phytophthora ramorum]]''.]] -->
'''''Phytophthora''''' (dari bentukan [[bahasa Yunani]] ''φυτόν'' (''phytón''), “tumbuhan” dan ''φθορά'' (''phthorá''), “kehancuran”; “penghancur tumbuhan”) adalah salah satu [[genus|marga]] [[Oomycetes]] yang anggota-anggotanya banyak menjadi penyebab penyakit tanaman penting sehingga meinmbulkan kerugian ekonomi, ekologi, dan demografi yang besar. TheMarga genusini wasdilaporkan firstpertama describedkali byoleh [[Anton de Bary|Heinrich Anton de Bary]] intahun 1875. Diperkirakan ada sekitar 100 anggotanya yang telah dipertelakan, meskipun ada kemungkinan anggotanya lebih daripada itu.<ref>Brasier CM, 2009. [http://www.fs.fed.us/psw/publications/documents/psw_gtr221/psw_gtr221.pdf#page=113 Phytophthora biodiversity: how many Phytophthora species are there?] In: Goheen EM, Frankel SJ, eds. Phytophthoras in Forests and Natural Ecosystems. Albany, CA, USA: USDA Forest Service: General Technical Report PSW-GTR-221, 101–15</ref>.
 
== Biologi ==
[[ImageBerkas:Phytophtora reproduction.png|thumbjmpl|centerkiri|200px|Phytophthora forms: A: Sporangia. B: Zoospore. C: Chlamydospore. D: Oospore.]]
''Phytophthora'' dapat bereproduksi secara seksual maupun aseksual. Struktur reproduksi seksual jarang ditemukan di alam, tetapi dapat dirangsang di pembiakan laboratorium. Pada jenis-jenis yang ''homotalus'', struktur seksual muncul dalam satu kultur tunggal; jenis-jenis yang heterotalus memiliki dua "jenis kelamin": A1 dan A2. <!-- When mated, [[Antheridium|antheridia]] introduce gametes into [[Oogonium|oogonia]], either by the oogonium passing through the antheridium (amphigyny) or by the antheridium attaching to the proximal (lower) half of the oogonium (paragyny), and the union producing oospores. Like animals, but not like most true Fungi, meiosis is gametic, and somatic nuclei are diploid. -->
[[ImageBerkas:Phytophthora_life_cyclePhytophthora life cycle.png|200px|kiri|The life cycle of ''Phytophthora'']]
Spora aseksual (terbentuk secara mitosis) dikenal sebagai [[klamidospora]] dan [[zoospora]]. Jenis spora yang terakhir dihasilkan dalam [[sporangium]] (jamak: sporangia). <!-- Chlamydospores are usually spherical and pigmented, and may have a thickened cell wall to aid in its role as a survival structure. Sporangia may be retained by the subtending hyphae (non-caducous) or be shed readily by wind or water tension (caducous) acting as dispersal structures. Also, sporangia may release zoospores, which have two unlike [[flagellum|flagella]] which they use to swim towards a host plant.
 
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* ''[[Phytophthora cinnamomi]]'' - causes cinnamon root rot affecting woody ornamentals including arborvitae, azalea, Chamaecyparis, dogwood, forsythia, Fraser fir, hemlock, Japanese holly, juniper, Pieris, rhododendron, Taxus, white pine, American chestnut and Australian Jarrah.
* ''[[Phytophthora fragariae]]'' - causes red root rot affecting strawberries
* ''[[Phytophthora kernoviae]]'' - pathogen of beech and rhododendron, also occurring on other trees and shrubs including oak, and holm oak. First seen in Cornwall, UK, in 2003.<ref>{{Cite journal | doi = 10.1017/S0953756205003357 | url = http://www.forestry.gov.uk/pdf/P_kernoviae_paper_2005.pdf/$FILE/P_kernoviae_paper_2005.pdf | title = Phytophthora kernoviae sp. Nov., an invasive pathogen causing bleeding stem lesions on forest trees and foliar necrosis of ornamentals in the UK | year = 2005 | author = Brasier, C | journal = Mycological Research | volume = 109 | pages = 853 | pmid = 16175787 | last2 = Beales | first2 = PA | last3 = Kirk | first3 = SA | last4 = Denman | first4 = S | last5 = Rose | first5 = J | issue = Pt 8 | postscript = --><!--None--><!-- }}</ref>
* ''[[Phytophthora palmivora]]'' - causes fruit rot in coconuts and betel nuts
* ''[[sudden oak death|Phytophthora ramorum]]'' – infects over 60 plant genera and over 100 host species - causes [[Sudden Oak Death]]<ref>[http://www.aphis.usda.gov/ppq/ispm/pramorum/pdf_files/usdaprlist.pdf "APHIS List of Regulated Hosts and Plants Associated with ''Phytophthora ramorum''" U.S. Animal and Plant Health Inspection Services];</ref>
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==Fungi resemblance==
''Phytophthora'' is sometimes referred to as a [[fungi|fungal]]-like organism but it is classified under a different kingdom altogether: [[Chromalveolata]] (formerly [[heterokont|Stramenopila]] and previously [[Chromista]]). This is a good example of [[convergent evolution]]: ''Phytophthora'' is morphologically very similar to true fungi yet its evolutionary history is quite distinct. In contrast to fungi, stramenopiles are more closely related to plants than animals. Whereas fungal cell walls are made primarily of [[chitin]], stramenopile cell walls are constructed mostly of [[cellulose]]. Ploidy levels are different between these two groups; Phytophthora have [[diploid]] (paired) chromosomes in the vegetative (growing, non-reproductive) stage of life, Fungi are almost always [[haploid]] in this state. Biochemical pathways also differ, notably the highly conserved [[Lysine]] synthesis path.
 
 
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== Spesies ==
 
==Spesies==
''[[Phytophthora boehmeriae]]''<br/>
''[[Phytophthora botryosa]]''<br/>
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''[[Phytophthora hibernalis]]''<br/>
''[[Phytophthora humicola]]''<br/>
''[[Phytophthora hydropathica]]''<ref name="csa new species">{{cite web|url=http://md1.csa.com/partners/viewrecord.php?requester=gs&collection=ENV&recid=8354020&q=Phytophthora+drechsleri&uid=1337633&setcookie=yes|title=Phytophthora irrigata and Phytophthora hydropathica, two new species from irrigation water at ornamental plant nurseries |last=Hong|first=C|coauthors=Gallegly, M, Richardson, P, Kong, P, Moorman, G, Lea-Cox, J, Ross, D|date=June 2008|work=Phytopathology Vol. 98, no. 6|accessdate=2009-06-05|archive-date=2012-03-07|archive-url=https://web.archive.org/web/20120307184325/http://md1.csa.com/partners/viewrecord.php?requester=gs&collection=ENV&recid=8354020&q=Phytophthora+drechsleri&uid=1337633&setcookie=yes|dead-url=yes}}</ref><br/>
''[[Phytophthora irrigata]]''<ref name="csa new species" /><br/>
''[[Phytophthora idaei]]''<br/>
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''[[Phytophthora mirabilis]]''<br/>
''[[Phytophthora multivesiculata]]''<br/>
''[[Phytophthora nemorosa]]''<ref>Hansen, Everett M.; Reeser, P. W.; Davidson, J. M.; Garbelotto, Matteo; Ivors, K.; Douhan, L.; and Rizzo, David M. (2003) "[http://nature.berkeley.edu/garbelotto/downloads/hansen2003.pdf ''Phytophthora nemorosa'', a new species causing cankers and leaf blight of forest trees in California and Oregon, U.S.A] ''Mycotaxon'' 88: pp. 129-138</ref><br/>
''[[Phytophthora nicotianae]]''<br/>
''[[Phytophthora palmivora]]''<br/>
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''[[Phytophthora vignae]]''
 
==Rujukan Referensi ==
{{Reflist|2}}
 
== Bacaan tambahan ==
* Lucas, J.A. ''et al.'' (eds.) (1991) ''Phytophthora'' based on a symposium held at Trinity College, Dublin, Ireland September 1989. British Mycological Society, Cambridge University Press, Cambridge, UK, ISBN 0-521-40080-5 ;
* Erwin, Donald C. and Ribeiro, Olaf K. (1966) ''Phytophthora Diseases Worldwide'' American Phytopathological Society Press, St. Paul, Minnesota, ISBN 0-89054-212-0
* Erwin, Donald C. (1983) ''Phytophthora: its biology, taxonomy, ecology, and pathology'' American Phytopathological Society Press, St. Paul, Minnesota, ISBN 0-89054-050-0
* [http://www.aphis.usda.gov/ppq/ispm/pramorum/pdf_files/usdaprlist.pdf "APHIS List of Regulated Hosts and Plants Associated with ''Phytophthora ramorum''" U.S. Animal and Plant Health Inspection Services] {{Webarchive|url=https://web.archive.org/web/20061212185042/http://www.aphis.usda.gov/ppq/ispm/pramorum/pdf_files/usdaprlist.pdf |date=2006-12-12 }}
* [http://www.naturebase.net/content/category/4/302/97/ "Dieback" Department of Environment and Conservation, Western Australia] {{Webarchive|url=https://web.archive.org/web/20070914081121/http://www.naturebase.net/content/category/4/302/97/ |date=2007-09-14 }}
 
== Pranala luar ==
{{commons category}}
{{Wikispecies|Phytophthora}}
* [http://www.btny.purdue.edu/USDA-ARS/Goodwin_lab/results/Phytoph_biblio.html Goodwin, Stephen B. (January 2001) "Phytophthora Bibliography" Purdue University] {{Webarchive|url=https://web.archive.org/web/20061014125542/http://www.btny.purdue.edu/USDA-ARS/Goodwin_lab/results/Phytoph_biblio.html |date=2006-10-14 }}
* [http://www.ladybug.uconn.edu/factsheets/tp_05_phytophthora.html Abbey, Tim (2005) "Phytophthora Dieback and Root Rot" College of Agriculture and Natural Resources, University of Connecticut] {{Webarchive|url=https://web.archive.org/web/20070506074931/http://www.ladybug.uconn.edu/factsheets/tp_05_phytophthora.html |date=2007-05-06 }}
* [http://www.bartlett.com/resources/Phytophthora-Canker.cfm "Phytophthora Canker - Identification, Biology and Management"] Bartlett Tree Experts Online Resource Library
* [http://www.bartlett.com/resources/Phytophthora-Root-Rot.cfm "Phytophthora Root Rot - Identification, Biology and Management"] Bartlett Tree Experts Online Resource Library
* [http://www.dwg.org.au/ Dieback Working Group] - Western Australia
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[[Kategori:Oomycetes]]
[[CategoryKategori:Penyakit tumbuhan]]
 
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