Functional roles of heterorhizy in water uptake of the rice root system

Yumika Watanabe

doi:10.26182/vkzw-qf41

Functional roles of heterorhizy in water uptake of the rice root system

Yumika Watanabe

UWA School of Agriculture and Environment

Research output: Thesis › Doctoral Thesis

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Abstract

This thesis examined the functional roles of heterorhizy in water uptake of rice root system that consists of three component roots. Overall, only S-type lateral roots (LRs) with the smallest diameter, lacked an exodermis and aerenchyma formation. Their development showed a significant positive correlation with hydraulic conductivity (Lp _r) at the level of whole root system as well as individual roots. The analysis of suberin deposition and aquaporin activity indicated that S-type LRs have the highest contribution to overall Lp _r of the radial water uptake pathway. These results strongly suggest that the three component roots play differential roles in water uptake.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Ranathunge, Kosala, Supervisor Colmer, Tim, Supervisor Yamauchi, Akira, Supervisor, External person Mitsuya, Shiro, Supervisor, External person
Award date	4 Mar 2022
DOIs	https://doi.org/10.26182/vkzw-qf41
Publication status	Unpublished - 2021

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10.26182/vkzw-qf41

THESIS - DOCTOR OF PHILOSOPHY - WATANABE, Yumika - 2021 - Part 1
THESIS - DOCTOR OF PHILOSOPHY - WATANABE, Yumika - 2021 - Part 2
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Cite this

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title = "Functional roles of heterorhizy in water uptake of the rice root system",

abstract = "This thesis examined the functional roles of heterorhizy in water uptake of rice root system that consists of three component roots. Overall, only S-type lateral roots (LRs) with the smallest diameter, lacked an exodermis and aerenchyma formation. Their development showed a significant positive correlation with hydraulic conductivity (Lp r) at the level of whole root system as well as individual roots. The analysis of suberin deposition and aquaporin activity indicated that S-type LRs have the highest contribution to overall Lp r of the radial water uptake pathway. These results strongly suggest that the three component roots play differential roles in water uptake.",

keywords = "rice (Oryza Sativa. L), root system, lateral root, water uptake, heterorhizy",

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school = "The University of Western Australia",

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AB - This thesis examined the functional roles of heterorhizy in water uptake of rice root system that consists of three component roots. Overall, only S-type lateral roots (LRs) with the smallest diameter, lacked an exodermis and aerenchyma formation. Their development showed a significant positive correlation with hydraulic conductivity (Lp r) at the level of whole root system as well as individual roots. The analysis of suberin deposition and aquaporin activity indicated that S-type LRs have the highest contribution to overall Lp r of the radial water uptake pathway. These results strongly suggest that the three component roots play differential roles in water uptake.

KW - rice (Oryza Sativa. L)

KW - root system

KW - lateral root

KW - water uptake

KW - heterorhizy

U2 - 10.26182/vkzw-qf41

DO - 10.26182/vkzw-qf41

M3 - Doctoral Thesis

ER -

Functional roles of heterorhizy in water uptake of the rice root system

Abstract

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