Back to Search
Start Over
Root growth of soybean cultivars under different water availability conditions
- Source :
- Semina: Ciências Agrárias, Vol 38, Iss 2, Pp 715-724 (2017)
- Publication Year :
- 2017
- Publisher :
- Universidade Estadual de Londrina, 2017.
-
Abstract
- Vigorous growth of soybean root system is a desired trait in breeding programs. However, few studies have evaluated this feature under field conditions. The aim of this research was to evaluate root growth of eight soybean cultivars under different water availability conditions. The experiment was carried out in Londrina, Paraná state, Brazil, during two growing seasons - with and without water deficit during the vegetative period. Soybean roots were sampled at flowering and assessed for dry matter yield, area and length at 0-0.25; 0.25-0.50; 0.50-0.75 and 0.75-1.00 m depth ranges. On average, root length and area of the cultivars Embrapa 48 and BRS 284 under water deficit were 66% and 40% larger than the others at 0.25-0.50 and 0.50-0.75 m layers, respectively. Under suitable water supply, BRS 282 showed the highest root length and area. Apart from the cultivars Embrapa 48, BRS 284, and BRS 255RR, soybean root growth was mostly lower under water deficit throughout the vegetative stage, which might been due to a higher soil resistance to root penetration, resulting from low soil water content. Drought increased the proportion of soybean roots at subsoil layers, mainly for Embrapa 48 and BRS 284. The cultivars Embrapa 48 and BRS 284 are promising to be used in breeding programs targeting superior root growth in subsoil layers.
- Subjects :
- 0106 biological sciences
Root growth
Root length
fungi
food and beverages
Growing season
Root mass
04 agricultural and veterinary sciences
Root system
Biology
lcsh:S1-972
01 natural sciences
Glycine max L
Agronomy
Soil water
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Dry matter
Root area
Cultivar
lcsh:Agriculture (General)
General Agricultural and Biological Sciences
Subsoil
010606 plant biology & botany
Subjects
Details
- ISSN :
- 16790359 and 1676546X
- Volume :
- 38
- Database :
- OpenAIRE
- Journal :
- Semina: Ciências Agrárias
- Accession number :
- edsair.doi.dedup.....66e963a14d4c13dbb3353c5d592551d7