Photosynthetic and physiological responses to drought of Jerusalem artichoke genotypes differing in drought resistance

Darunee Puangbut, Sanun Jogloy, Nimitr Vorasoot and Patcharin Songsri

Agricultural Water Management, 2022, vol. 259, issue C

Abstract: Plant physiological and photosynthetic responses to drought among Jerusalem artichoke genotypes possessing different levels of drought resistance are still lacking. We investigated the physiological and photosynthetic responses to drought of six Jerusalem artichoke genotypes differing in drought-resistance levels and evaluated the contribution of physiological and photosynthetic traits to tuber yield under drought condition. The split-plot in randomized complete block design with four replications was used. Six Jerusalem artichoke genotypes as sub-plots were nested in two water regimes (100% ET and 50% ET) as main plots. Relative water content (RWC) was recorded at 30, 60, and 90 days after transplanting (DAT), while SPAD chlorophyll meter reading (SCMR), net photosynthetic rate (Pn), stomatal conductance (gs), and leaf area (LA) were recorded at 30 and 90 DAT. Biomass and tuber yield were recorded at harvest stage. Water deficit restricted RWC by 20.45%, LA by 23.29%, Pn by 9.87, gs by 40.315, biomass by 42.62, and tuber yield by 46.13%, yet increased SCMR (6.74%) of six genotypes. The reductions observed on all traits of drought-resistant genotypes were smaller than that of susceptible genotypes. A drought-resistant genotype KT 50-4 showed a low tuber yield reduction (36.59%) and LA (16.34%) under water deficit condition, whereas KT 50-4, JA 60, and JA 125 had low reductions of Pn (7.06–9.75%) and gs (15.40–42.86%) under water deficit condition. While LA had a significant contribution to tuber yield under fully irrigated (80.11%) and drought (85.57%), Pn and SCMR had smaller contributions to tuber yield under drought condition (3.73% and 12.65%). Our results indicated that improvement of LA could contribute to high tuber yield under limited water conditions.

Keywords: Helianthus tuberosus; Mild drought; Photosynthesis; Chlorophyll; Drought-resistant genotype (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378377421005291
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:259:y:2022:i:c:s0378377421005291

DOI: 10.1016/j.agwat.2021.107252

Access Statistics for this article

Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns

More articles in Agricultural Water Management from Elsevier
Bibliographic data for series maintained by Catherine Liu ().