Agricultural and Biosystems Engineering Publications
Document Type
Article
Publication Version
Published Version
Publication Date
10-2015
Journal or Book Title
Biomass and Bioenergy
Volume
81
First Page
369
Last Page
377
DOI
10.1016/j.biombioe.2015.07.027
Abstract
The objective of this study was to determine effects of drought on selected root growth parameters and develop relationships between root parameters and tuber yield for selected Jerusalem artichoke (JA) genotypes. Three water regimes (Field capacity, 50% available soil water (AW) and 25% AW) and five JA varieties (JA 60, JA 125, JA 5, JA 89 and HEL 65) were planted with factorial treatments in a randomized complete block design with four replications. Data on root dry weight (RDW) and root: shoot ratios (RSR) were measured manually. Root diameter (RD), root length (RL), root surface area (RSA) and root volume (RV) were collected at harvest. Drought tolerance indices (DTI) were calculated for all root parameters. Drought reduced all root parameters and DTI but increased RSR in JA 60, JA 125, JA 5, and HEL 65. JA 125 had high values for all root traits and DTI of these traits under drought stress. JA 60 had high DTI of RDW, RD and RSR under mild and severe water stress. JA 5 had high DTI of RDW, RD, RL, RSR and RV under drought conditions. JA 89 and HEL 65 performed well for RDW, RD, RL and low DTI of all root characteristics. DTI for root parameters were positively correlated with tuber dry weight under mild and severe water stress. The JA 5, JA 60 and JA 125 varieties showed high DTI for some root traits, indicating that better root parameters contributed to higher tuber yield under drought stress.
Access
Open
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Ruttanaprasert, Ruttanachira; Jogloy, Sanun; Vorasoot, Nimitr; Kesmala, Thawan; Kanwar, Rameshwar S.; Holbrook, Carl C.; and Patanothai, Aran, "Root responses of Jerusalem artichoke genotypes to different water regimes" (2015). Agricultural and Biosystems Engineering Publications. 678.
https://lib.dr.iastate.edu/abe_eng_pubs/678
Included in
Agricultural Science Commons, Agriculture Commons, Bioresource and Agricultural Engineering Commons
Comments
This article is from Biomass and Bioenergy 81 (2015): 369–377, doi:10.1016/j.biombioe.2015.07.027.