Interspecific differences in root architecture among maize and triticale genotypes grown under drought, waterlogging and soil compaction

摘要: Environmental stresses (soil compaction, drought, waterlogging) cause changes in plants’ root system structure, also affecting the growth of above-ground parts. The aim this study was to estimate phenotypic variation among maize and triticale genotypes penetration ability through petrolatum-wax-layer (RPA). Also, effect shortage or excess soil water on dry matter shoots roots morphological structure sensitive resistant grown low high compaction level evaluated. To RPA index, method (PWL) used. strength three petrolatum-wax concentrations 60, 50 40 % 0.52, 1.07 1.58 MPa, respectively. High coefficients (CV) were observed 0.52 1.07 MPa for 19.2 21.7 %, triticale, 12.5 18.3 %, data indicate that use PWL technique is an effective screening method, makes it possible divide into groups. second part investigated a multistress combined with drought waterlogging shoot differing susceptibility environmental stresses. Seedlings 4 weeks root-boxes under conditions (LSC 1.1 g cm−3) severe (SSC 1.6 g cm−3) compaction. Drought applied 2 weeks from 14th 28th day. In comparison LSC treatment, SSC treatment decrease greater (Ancora, CHD-147). Soil caused seedlings LSC. index (RPI) estimated as ratio 15–40 cm root-box layer total matter. On basis RPI group according their distribute profile. LSC, exerted strong influence length seminal adventitious roots, well number L- S-type lateral developed nodal roots. both species restriction more (Ankora, CHD-147) than (Tina, CHD-247) genotypes. propagation maize. Exposure case treatments particular components structure. plants drought. CHD147) Statistically significant correlations found between these indexes indexes. This indicates waterlogging.