Journal
PLANT PRODUCTION SCIENCE
Volume 14, Issue 4, Pages 307-317Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1626/pps.14.307
Keywords
Chromosome segment substitution lines; Dry matter production; Rice; Root length density; Root plasticity; Water deficit
Categories
Funding
- Japan Society for the Promotion of Science [22380013, 21007569]
- Ministry of Agriculture, Forestry and Fisheries of Japan [QTL-4004]
- Grants-in-Aid for Scientific Research [22380013] Funding Source: KAKEN
Ask authors/readers for more resources
Root traits that can contribute to drought resistance have not been clearly indentified. We examined the role of root system development in enhancing water uptake and contribution to dry matter production by using the root box-pinboard method, with which quantitative assessment of root system development and the water uptake of root are possible. Chromosome segment substitution lines CSSL45 and CSSL50, and the recurrent parent Nipponbare were grown under continuously waterlogged conditions (control), and various intensities of water deficit in root boxes. There was no significant difference among the genotypes in shoot growth and root development, while CSSL45 and CSSL50 showed greater shoot dry weight than Nipponbare under water deficit conditions. This was due to their abilities to promote root system development as compared with Nipponbare, which facilitated greater water extraction than Nipponbare, especially under the mild water deficit condition of 20-25% w/w soil moisture contents. Furthermore, the increased root length density did not exceed the estimated critical value for water uptake, which indicates that plastic root system development was functionally effective and efficient for the enhancement of water uptake under mild water deficit conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available