Disruption of mycorrhizal extraradical mycelium and changes in leaf water status and soil aggregate stability in rootbox-grown trifoliate orange.

Arbuscular mycorrhizas possess well developed extraradical mycelium (ERM) network that enlarge the surrounding soil for better acquisition of water and nutrients, besides soil aggregation. Distinction in ERM functioning was studied under a rootbox system, which consisted of root+hyphae and root-free hyphae compartments separated by 37-μm nylon mesh with an air gap. Trifoliate orange (Poncirus trifoliata) seedlings were inoculated with Funneliformis mosseae in root+hyphae compartment, and the ERM network was established between the two compartments.

Genetic Diversity of the Indian Populations of 'Candidatus Liberibacter asiaticus' Based on the Tandem Repeat Variability in a Genomic Locus.

Citrus huanglongbing (HLB, citrus greening disease) is an extremely destructive disease affecting citrus and causes severe economic loss to the crop yield worldwide. The disease is caused by a phloem-limited, noncultured, gram-negative bacteria Candidatus Liberibacter spp., the widely present and most destructive species being 'Candidatus Liberibacter asiaticus'.

Crystal structure of a periplasmic solute binding protein in metal-free, intermediate and metal-bound states from Candidatus Liberibacter asiaticus.

The Znu system, a member of ABC transporter family, is critical for survival and pathogenesis of Candidatus Liberibacter asiaticus (CLA). Two homologues of this system have been identified in CLA. Here, we report high resolution crystal structure of a periplasmic solute binding protein from second of the two gene clusters of Znu system in CLA (CLas-ZnuA2) in metal-free, intermediate and metal-bound states.

Mycorrhizal-induced calmodulin mediated changes in antioxidant enzymes and growth response of drought-stressed trifoliate orange.

Trifoliate orange [Poncirus trifoliata (L) Raf.] is considered highly arbuscular mycorrhizal (AM) dependent for growth responses through a series of signal transductions in form of various physiological responses. The proposed study was carried out to evaluate the effect of an AM fungus (Funneliformis mosseae) on growth, antioxidant enzyme (catalase, CAT; superoxide dismutase, SOD) activities, leaf relative water content (RWC), calmodulin (CaM), superoxide anion ([Formula: see text]), and hydrogen peroxide (H2O2) concentrations in leaves of the plants exposed to both well-watered (WW) and drought stress (DS) conditions.

Unigene-Derived Microsatellite Marker Based Variation Study of Phytophthora nicotianae Isolates Infecting Citrus.

Unigene sequence in public database provides a cost-effective and valuable source, for the development of microsatellite markers also known as unigene-derived microsatellite (UGMS) markers. In our study, genetic variation among 24 Phytophthora nicotianae isolates from five major citrus growing states of India were analysed through UGMS markers. Morphological and clustering results indicated variation among these Phytophthora nicotianae were independent of its geographical confinement and showed 62.

Physico-chemical, respiratory and fungicide residue changes in wax coated mandarin fruit stored at chilling temperature with intermittent warming.

Influence of chilling temperature, intermittent warming (IW) and fungicidal wax coating was evaluated during storage of 'Nagpur' mandarins (Citrus reticulata Blanco). Fruits were light green coloured with slight colour-break at the start of storage. Waxed and non-waxed fruits were stored at 3.

First Report of the Huanglongbing Bacterium 'Candidatus Liberibacter asiaticus' Infecting Satkara (Citrus macroptera) in India.

In India, satkara (Citrus macroptera) is found in the northeastern regions of Shella and Dowki near Cherrapunji in Meghalaya, the Jampui Hills of Tripura and Mizoram, and the Chendel District of Manipur. Locally, it is called satkara because 'sat' refers to multiples of seven and the fruit generally contains fourteen segments. The fruit is used in the preparation of pickles and its oil is used in the perfume industry.

Occurrence of Witches'-Broom, a New Phytoplasma Disease of Acid Lime (Citrus aurantifolia) in India.

In India, acid lime (Citrus aurantifolia (L.) Swingle) is one of the most important citrus fruits grown. It constitutes nearly 20% of the total citrus production.