TY - JOUR
T1 - Responses of key root traits in the genus Oryza to soil flooding mimicked by stagnant, deoxygenated nutrient solution
AU - Tong, Shuai
AU - Kjær, Johan Emil
AU - Peralta Ogorek, Lucas León
AU - Pellegrini, Elisa
AU - Song, Zhiwei
AU - Pedersen, Ole
AU - Herzog, Max
N1 - Funding Information:
The provision of seeds of wild Oryza species by IRRI Seed Bank and Sokoine University of Agriculture is greatly acknowledged.The authors acknowledge the constructive comments to an early version of the paper by Drs Lukasz Kotula and Juan d. l. C. Jiménez as well as the suggestions from the anonymous referees. This project received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 801199 (LLPO) and no. 839542 (EP), the Danish International Development Agency, DANIDA (grant no. 19-03-KU to OP), and the Independent Research Fund Denmark (grant no. 8021-00120B). ST (202003250084) and ZS (202006300009) were funded by China Scholarship Council.
Publisher Copyright:
© The Author(s) 2023. Published by Oxford University Press on behalf of the Society for Experimental Biology.
PY - 2023/3/28
Y1 - 2023/3/28
N2 - Excess water can induce flooding stress resulting in yield loss, even in wetland crops such as rice (Oryza). However, traits from species of wild Oryza have already been used to improve tolerance to abiotic stress in cultivated rice. This study aimed to establish root responses to sudden soil flooding among eight wild relatives of rice with different habitat preferences benchmarked against three genotypes of O. sativa. Plants were raised hydroponically, mimicking drained or flooded soils, to assess the plasticity of adventitious roots. Traits included were apparent permeance (PA) to O2 of the outer part of the roots, radial water loss, tissue porosity, apoplastic barriers in the exodermis, and root anatomical traits. These were analysed using a plasticity index and hierarchical clustering based on principal component analysis. For example, O. brachyantha, a wetland species, possessed very low tissue porosity compared with other wetland species, whereas dryland species O. latifolia and O. granulata exhibited significantly lower plasticity compared with wetland species and clustered in their own group. Most species clustered according to growing conditions based on PA, radial water loss, root porosity, and key anatomical traits, indicating strong anatomical and physiological responses to sudden soil flooding.
AB - Excess water can induce flooding stress resulting in yield loss, even in wetland crops such as rice (Oryza). However, traits from species of wild Oryza have already been used to improve tolerance to abiotic stress in cultivated rice. This study aimed to establish root responses to sudden soil flooding among eight wild relatives of rice with different habitat preferences benchmarked against three genotypes of O. sativa. Plants were raised hydroponically, mimicking drained or flooded soils, to assess the plasticity of adventitious roots. Traits included were apparent permeance (PA) to O2 of the outer part of the roots, radial water loss, tissue porosity, apoplastic barriers in the exodermis, and root anatomical traits. These were analysed using a plasticity index and hierarchical clustering based on principal component analysis. For example, O. brachyantha, a wetland species, possessed very low tissue porosity compared with other wetland species, whereas dryland species O. latifolia and O. granulata exhibited significantly lower plasticity compared with wetland species and clustered in their own group. Most species clustered according to growing conditions based on PA, radial water loss, root porosity, and key anatomical traits, indicating strong anatomical and physiological responses to sudden soil flooding.
KW - Aerenchyma
KW - barrier to radial oxygen loss
KW - phenotypic plasticity
KW - radial oxygen loss
KW - radial water loss
KW - rice
KW - root porosity
KW - root respiration
KW - waterlogging
UR - http://www.scopus.com/inward/record.url?scp=85158944306&partnerID=8YFLogxK
U2 - 10.1093/jxb/erad014
DO - 10.1093/jxb/erad014
M3 - Article
C2 - 36629284
AN - SCOPUS:85158944306
SN - 0022-0957
VL - 74
SP - 2112
EP - 2126
JO - Journal of Experimental Botany
JF - Journal of Experimental Botany
IS - 6
ER -