Diversity and species composition of arbuscular mycorrhizal fungi in Clerodendrum species

Abstract

Songachan LS, Kayang H, Moinao P 2015 -Diversity and species composition of arbuscular mycorrhizal fungi in Clerodendrum species. Mycosphere 6(2), 150-158, Doi 10.5943/mycosphere/6/2/5 AbstractTwo Clerodendrum species viz., Clerodendrum colebrookianum and Clerodendrum buchananii were studied for diversity of arbuscular mycorrhizal fungi (AMF). A rhizosphere soil was found to be acidic and soil phosphorus was low for both the plant species. AMF colonization in the form of arbuscules, vesicles and hyphae were observed. Hyphal colonization was high compared to vesicles and arbuscules. The percent of AMF colonization in C. colebrookianum was 29.77 %, whereas in C. buchananii it was 25.83 %. However, AMF colonization in trap culture from C. buchananii derived inoculum source was found to be higher (18.07 %) as compared to C. colebrookianum (16.31 %). On the basis of morphological characteristics, a total of 20 AMF species belonging to two genera viz., Acaulospora and Glomus were isolated from the two studied plant species, whereas from trap culture, 14 AMF species were isolated. This study gives the gist of AMF status of two Clerodendrum species and it revealed that the AMF composition and diversity varies in the two Clerodendrum species.

Effects of Arbuscular Mycorrhizal Fungi on Spores Density and Root Colonization of Four Hybrids of Sunflower (Helianthus annuus L.) at Different Rock Phosphate Levels

“…In this research we found that the species of Acaulospora were most common and predominant followed by Glomus, Sclerocystis, and Gigaspora. Our findings are further supported by the work of other researchers (Lovelock et al, 2003;Wongmo, 2008;Tchabi et al, 2008;Charoenpakdee et al, 2010;Gao and Guo, 2010;Songachan and Kayang, 2011) who investigated that there is higher number of Acaulospora in the soil followed by Glomus species. The predominance of Acaulospora species might be due to their adaptation to wide variety of soil types, host species and pH and nutrient availability etc ( Jefwa et al, 2006;Straker et al, 2010).…”

Abundance and distribution of arbuscular mycorrhizal fungi associated with oil‐yielding plants

“…Likewise, Acaulospora species prefer acidic soils [39], and Gigaspora species are predominant in soil with high sand content [39]. The abundance of many types of AMF in India provided evidence that the genus Glomus is widespread across many environments, and there are several reports on the presence of Glomus in intensively managed agriculture systems [27,39,43,44]. Several agricultural practices, like the application of fertilizers, pesticides, tillage, etc., disturb the hyphal development of AMF and thus reduce the propagation of AMF spores [44].…”

“…The abundance of many types of AMF in India provided evidence that the genus Glomus is widespread across many environments, and there are several reports on the presence of Glomus in intensively managed agriculture systems [27,39,43,44]. Several agricultural practices, like the application of fertilizers, pesticides, tillage, etc., disturb the hyphal development of AMF and thus reduce the propagation of AMF spores [44]. AMF spores vary considerably from place to place according to the physical and chemical nature of the soil, and their distribution is influenced by several biotic and abiotic aspects [44].…”

“…Several agricultural practices, like the application of fertilizers, pesticides, tillage, etc., disturb the hyphal development of AMF and thus reduce the propagation of AMF spores [44]. AMF spores vary considerably from place to place according to the physical and chemical nature of the soil, and their distribution is influenced by several biotic and abiotic aspects [44]. Reports have shown that the plant's roots affect the AMF spore germination rate, germtube orientation, hyphal branching, recognition of the host root, colonization intensity, hyphal expansion into the soil, and sporulation [44,45].…”

Rhizosphere microbial community dynamics contribute to nitrogen fixation and forage quality in novel perennial intercrops in Rwanda

“…Similarly, OTU 499, belonging to the Phaeosphaeriaceae family, was enriched in intercropped Napier rhizospheres and is a monocotyledon-associated plant saprotroph or pathogen (Cannon and Kirk, 2007;Phookamsak et al, 2014). Lastly, Dentiscutata (OTU 828) in Napier is a known bene cial AMF genus that has been identi ed in acidic tropical agricultural soils, including India (Khade, 2010) and Brazil (Krüger et al, 2014).…”