Rhizosphere Effect on Nutrient Availability in Soil and Its Uptake by Plants: A Review

Availability of Mn, Zn and Fe in the rhizosphere

“…Availability of nutrients in the rhizosphere is controlled by the combined effects of soil properties, plant characteristics, and the interactions of plant roots with microorganisms and the surrounding soil (eg. Dotaniya and Meena, 2015). The rhizosphere is characterised by relatively high concentration of easily degradable compounds exuded from roots (Vranova et al, 2013), especially at the root tip (eg.…”

“…Chemical conditions in the rhizosphere, including pH, are usually quite different from those in the bulk soil farther away from roots (Rengel, 2002b;Dotaniya and Meena, 2015). Root-induced changes in the rhizosphere pH are a result of the balance between H + and HCO 3 -(OH -) excretion, the release of CO 2 by respiration and the excretion and decomposition of various organic compounds exuded by roots (Hinsinger et al, 2003).…”

“…Soil Zn availability and the plant Zn status influence the composition and abundance of microbial communities in the rhizosphere (Rengel, 1997b;Dotaniya and Meena, 2015). Some microbial species may be instrumental in increasing Zn availability in the rhizosphere (see Muhammad et al, 2014) because soil microflora was not Zn-deficient in low-Zn soil (Khan and Joergensen, 2010).…”

Effect of date of sowing and crop geometry on growth and yield parameters of forage mustard (Var. Chinese Cabbage)

“…These were mainly due to favorable temperature and nutrient dynamics (Dotaniya and Meena, 2013) enhanced higher number of primary, secondary and tertiary branches at harvest (Kurmi, 2002 Shivani and Kumar, 2002). The weight of siliqua/plant and weight of siliqua/m 2 was found significantly with respect to dates of sowing and crop geometry.…”

The ecological role of volatile mediated interactions belowground

“…For instance, a recent study by Yuan et al (2017) showed that bacterial VOCs could alter the composition of soil bacterial and fungal communities and could decrease the alpha-diversity of the soil microbial community. Moreover, in combination with the fact that plant root VOCs can also influence distant soil bacteria (Chapter 7), one could argue that the rhizosphere effect is actually not restricted to the narrow zone around the roots as initially defined by Hiltner (1904) but that VOCs-mediated interactions can expand the rhizosphere effect further than the few millimeters around the roots (Dotaniya & Meena 2015). In this respect, VOCs released by plant roots and rhizosphere inhabiting microbes can affect important processes of the soil nitrogen cycle (Bending & Lincoln 2000;Insam & Seewald 2010;Yuan et al 2017).…”