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Partial root-zone drying irrigation increases water-use efficiency of tobacco plants amended with biochar

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Partial root-zone drying irrigation increases water-use efficiency of tobacco plants amended with biochar. / Liu, Xuezhi; Wei, Zhenhua; Manevski, Kiril; Liu, Jie; Ma, Yingying; Andersen, Mathias Neumann; Liu, Fulai.

In: Industrial Crops and Products, Vol. 166, 113487, 08.2021.

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Liu, Xuezhi ; Wei, Zhenhua ; Manevski, Kiril ; Liu, Jie ; Ma, Yingying ; Andersen, Mathias Neumann ; Liu, Fulai. / Partial root-zone drying irrigation increases water-use efficiency of tobacco plants amended with biochar. In: Industrial Crops and Products. 2021 ; Vol. 166.

Bibtex

@article{26e2368795784baf8e4903a1fcec595a,
title = "Partial root-zone drying irrigation increases water-use efficiency of tobacco plants amended with biochar",
abstract = "Modulation of stomatal morphology and behavior is associated with changes in water use of the plant due to varied input of water, yet the underlying mechanism of such association remains largely elusive. We investigated the effects of reduced irrigation on leaf gas exchange and stomatal morphology of tobacco (Nicotiana tabacum L.) plants grown in a Ferralsol and an Anthrosol amended by softwood (SWB) and wheat (Triticum aestivum L.) straw biochar (WSB). Compared to plants grown under full irrigation (FI), deficit irrigation (DI) and especially alternate partial root-zone drying irrigation (PRD) significantly decreased the stomatal conductance (gs) while marginally reducing the leaf photosynthetic rate (An), thereby enhancing intrinsic water-use efficiency (WUEi=An/gs), whereas the effects of biochars were not evident. Moreover, reduced irrigation, particularly PRD, increased the concentration of abscisic acid in the leaf ([ABA]leaf) compared to FI, which was further amplified by WSB addition. Leaf carbon isotope discrimination (Δ13Cleaf) responded similarly to irrigation and biochar addition as gs. Compared to FI, reduced irrigation (DI and PRD) lowered stomata size (SS) but increased their density (SD) and this effect was more pronounced for PRD coupled with WSB. Moreover, SD was significantly positively correlated with [ABA]leaf, while negatively correlated with gs, soil water content, and Δ13Cleaf. The opposite correlations between SS and these variables were observed. The results collectively suggest that ABA-mediated the effects of PRD combined with WSB amendment resulted in higher SD and lower SS and gs, contributing to the increased WUEi and long-term WUE of tobacco plants.",
author = "Xuezhi Liu and Zhenhua Wei and Kiril Manevski and Jie Liu and Yingying Ma and Andersen, {Mathias Neumann} and Fulai Liu",
year = "2021",
month = aug,
doi = "10.1016/j.indcrop.2021.113487",
language = "English",
volume = "166",
journal = "Industrial Crops and Products",
issn = "0926-6690",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Partial root-zone drying irrigation increases water-use efficiency of tobacco plants amended with biochar

AU - Liu, Xuezhi

AU - Wei, Zhenhua

AU - Manevski, Kiril

AU - Liu, Jie

AU - Ma, Yingying

AU - Andersen, Mathias Neumann

AU - Liu, Fulai

PY - 2021/8

Y1 - 2021/8

N2 - Modulation of stomatal morphology and behavior is associated with changes in water use of the plant due to varied input of water, yet the underlying mechanism of such association remains largely elusive. We investigated the effects of reduced irrigation on leaf gas exchange and stomatal morphology of tobacco (Nicotiana tabacum L.) plants grown in a Ferralsol and an Anthrosol amended by softwood (SWB) and wheat (Triticum aestivum L.) straw biochar (WSB). Compared to plants grown under full irrigation (FI), deficit irrigation (DI) and especially alternate partial root-zone drying irrigation (PRD) significantly decreased the stomatal conductance (gs) while marginally reducing the leaf photosynthetic rate (An), thereby enhancing intrinsic water-use efficiency (WUEi=An/gs), whereas the effects of biochars were not evident. Moreover, reduced irrigation, particularly PRD, increased the concentration of abscisic acid in the leaf ([ABA]leaf) compared to FI, which was further amplified by WSB addition. Leaf carbon isotope discrimination (Δ13Cleaf) responded similarly to irrigation and biochar addition as gs. Compared to FI, reduced irrigation (DI and PRD) lowered stomata size (SS) but increased their density (SD) and this effect was more pronounced for PRD coupled with WSB. Moreover, SD was significantly positively correlated with [ABA]leaf, while negatively correlated with gs, soil water content, and Δ13Cleaf. The opposite correlations between SS and these variables were observed. The results collectively suggest that ABA-mediated the effects of PRD combined with WSB amendment resulted in higher SD and lower SS and gs, contributing to the increased WUEi and long-term WUE of tobacco plants.

AB - Modulation of stomatal morphology and behavior is associated with changes in water use of the plant due to varied input of water, yet the underlying mechanism of such association remains largely elusive. We investigated the effects of reduced irrigation on leaf gas exchange and stomatal morphology of tobacco (Nicotiana tabacum L.) plants grown in a Ferralsol and an Anthrosol amended by softwood (SWB) and wheat (Triticum aestivum L.) straw biochar (WSB). Compared to plants grown under full irrigation (FI), deficit irrigation (DI) and especially alternate partial root-zone drying irrigation (PRD) significantly decreased the stomatal conductance (gs) while marginally reducing the leaf photosynthetic rate (An), thereby enhancing intrinsic water-use efficiency (WUEi=An/gs), whereas the effects of biochars were not evident. Moreover, reduced irrigation, particularly PRD, increased the concentration of abscisic acid in the leaf ([ABA]leaf) compared to FI, which was further amplified by WSB addition. Leaf carbon isotope discrimination (Δ13Cleaf) responded similarly to irrigation and biochar addition as gs. Compared to FI, reduced irrigation (DI and PRD) lowered stomata size (SS) but increased their density (SD) and this effect was more pronounced for PRD coupled with WSB. Moreover, SD was significantly positively correlated with [ABA]leaf, while negatively correlated with gs, soil water content, and Δ13Cleaf. The opposite correlations between SS and these variables were observed. The results collectively suggest that ABA-mediated the effects of PRD combined with WSB amendment resulted in higher SD and lower SS and gs, contributing to the increased WUEi and long-term WUE of tobacco plants.

U2 - 10.1016/j.indcrop.2021.113487

DO - 10.1016/j.indcrop.2021.113487

M3 - Journal article

VL - 166

JO - Industrial Crops and Products

JF - Industrial Crops and Products

SN - 0926-6690

M1 - 113487

ER -