Photosynthetic decline in aging perennial grass is not fully explained by leaf nitrogen

Mauricio Tejera; Nicholas N Boersma; Sotirios V Archontoulis; Fernando E Miguez; Andy Vanloocke; Emily A Heaton

doi:10.1093/jxb/erac382

Photosynthetic decline in aging perennial grass is not fully explained by leaf nitrogen

Mauricio Tejera, Nicholas N Boersma, Sotirios V Archontoulis, Fernando E Miguez, Andy Vanloocke, Emily A Heaton

Research output: Contribution to journal › Article › peer-review

Abstract

Aging in perennial plants is traditionally observed in terms of changes in end-of-season biomass, however, the driving phenological and physiological changes are poorly understood. We found that three-year-old (mature) stands of the perennial grass Miscanthus × giganteus had 19 – 30% lower Anet than one-year-old M. × giganteus (juvenile) stands; 10 – 34% lower maximum carboxylation rates of rubisco (P < 0.05); and 34% lower light saturated Anet (Asat; P < 0.05). These changes could be related to nitrogen (N) limitations as mature plants were larger and had 14-34% lower leaf N on an area basis (Na) than juveniles (P

Original language	English (US)
Journal	Journal of experimental botany
DOIs	https://doi.org/10.1093/jxb/erac382
State	E-pub ahead of print - Oct 4 2022

Keywords

Bioenergy
size effect
sink limitation
nitrogen dilution
plant aging
photosynthesis
C4 metabolism

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10.1093/jxb/erac382License: CC BY

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title = "Photosynthetic decline in aging perennial grass is not fully explained by leaf nitrogen",

abstract = "Aging in perennial plants is traditionally observed in terms of changes in end-of-season biomass, however, the driving phenological and physiological changes are poorly understood. We found that three-year-old (mature) stands of the perennial grass Miscanthus × giganteus had 19 – 30% lower Anet than one-year-old M. × giganteus (juvenile) stands; 10 – 34% lower maximum carboxylation rates of rubisco (P < 0.05); and 34% lower light saturated Anet (Asat; P < 0.05). These changes could be related to nitrogen (N) limitations as mature plants were larger and had 14-34% lower leaf N on an area basis (Na) than juveniles (P",

keywords = "Bioenergy, size effect, sink limitation, nitrogen dilution, plant aging, photosynthesis, C4 metabolism",

author = "Mauricio Tejera and Boersma, {Nicholas N} and Archontoulis, {Sotirios V} and Miguez, {Fernando E} and Andy Vanloocke and Heaton, {Emily A}",

year = "2022",

month = oct,

day = "4",

doi = "10.1093/jxb/erac382",

language = "English (US)",

journal = "Journal of Experimental Botany",

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publisher = "Oxford University Press",

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TY - JOUR

T1 - Photosynthetic decline in aging perennial grass is not fully explained by leaf nitrogen

AU - Tejera, Mauricio

AU - Boersma, Nicholas N

AU - Archontoulis, Sotirios V

AU - Miguez, Fernando E

AU - Vanloocke, Andy

AU - Heaton, Emily A

PY - 2022/10/4

Y1 - 2022/10/4

N2 - Aging in perennial plants is traditionally observed in terms of changes in end-of-season biomass, however, the driving phenological and physiological changes are poorly understood. We found that three-year-old (mature) stands of the perennial grass Miscanthus × giganteus had 19 – 30% lower Anet than one-year-old M. × giganteus (juvenile) stands; 10 – 34% lower maximum carboxylation rates of rubisco (P < 0.05); and 34% lower light saturated Anet (Asat; P < 0.05). These changes could be related to nitrogen (N) limitations as mature plants were larger and had 14-34% lower leaf N on an area basis (Na) than juveniles (P

AB - Aging in perennial plants is traditionally observed in terms of changes in end-of-season biomass, however, the driving phenological and physiological changes are poorly understood. We found that three-year-old (mature) stands of the perennial grass Miscanthus × giganteus had 19 – 30% lower Anet than one-year-old M. × giganteus (juvenile) stands; 10 – 34% lower maximum carboxylation rates of rubisco (P < 0.05); and 34% lower light saturated Anet (Asat; P < 0.05). These changes could be related to nitrogen (N) limitations as mature plants were larger and had 14-34% lower leaf N on an area basis (Na) than juveniles (P

KW - Bioenergy

KW - size effect

KW - sink limitation

KW - nitrogen dilution

KW - plant aging

KW - photosynthesis

KW - C4 metabolism

U2 - 10.1093/jxb/erac382

DO - 10.1093/jxb/erac382

M3 - Article

C2 - 36194426

SN - 0022-0957

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

ER -

Photosynthetic decline in aging perennial grass is not fully explained by leaf nitrogen

Abstract

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