Phytophthora: Perbedaan antara revisi
Konten dihapus Konten ditambahkan
Kembangraps (bicara | kontrib) k →Biologi |
Kembangraps (bicara | kontrib) kTidak ada ringkasan suntingan |
||
Baris 20:
[[Image:Phytophtora reproduction.png|thumb|left|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. -->
[[Image:Phytophthora_life_cycle.png|200px|left|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.
Baris 32:
* ''[[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>
|