Pak. J. Bot., 44(4): 1479-1485, 2012. |
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Updated: 16-08-12 | ||||
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MORPHOLOGICAL DIVERSITY OF ARBUSCULAR MYCORRHIZA COLONIZING TWO AROMAIC GRASSES VETEVIRIA ZIZANIOIDES AND CYMBOPOGON JWARANCUSA
MUHAMMAD SHAFIQ CHAUDHRY1*, MADIHA SAEED1, ASAD ALI KHAN2, NUZHAT SIAL1 AND MOAZAM JAMIL 3
Abstract:
A survey of two aromatic grasses Cymbopogon jwarancusa
and Veteviria zizanioides was conducted to determine the morphological diversity of mycorrhiza collected from
various habitats of southern Punjab and northern areas of Pakistan. The mycorrhizal colonization has been categorized as
extraradical and internal colonization along with Arum-type and Paris-type mycorrhiza. The extraradical phase consists
of various types of hyphae while internal phase is comprised hyphae and a variety of endogenous structures (i.e. vesicles,
arbuscules, hyphal coils and cuttings of hyphae in the cortical regions of the fine roots). Hyphal coiling was frequently
observed in C. jwarancusa, coiled hypha were mostly aseptate, and coenocytic, while hyphal coiling was uncommon in V.
zizanioides. No arbuscule had been observed in C. jwarancusa but feeder roots in V. zizanioides had extensive arbuscular
colonization. Higher morphological diversity was observed in the roots of C. jwarancusa as compared to V. zizanioides.
Both Paris and Arum type of Mycorrhiza were observed in the studied grasses. Many extraradical and intraradical
non-mycorrhizal dark septate endophytic fungi along with unique type of
hyphae with hyaline wall were also observed. The dark septate
endophytic fungi had melanized hyphae and microsclerotia. The dimeter of microsclerotia ranged from 1.9 to 3.8μm. 1Department of Life Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan. *Corresponding author E-mail: cids_2005@hotmail.com; Cell Phone: +923336393674 2Department of Geography, The Islamia University of Bahawalpur, Bahawalpur, Pakistan. 3University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan. |
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