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Countering elevated CO 2 induced Fe and Zn reduction in Arabidopsis seeds
Author(s) -
Sun Peng,
Isner JeanCharles,
CoupelLedru Aude,
Zhang Qi,
Pridgeon Ashley J.,
He Yaqian,
Menguer Paloma K.,
Miller Anthony J.,
Sanders Dale,
Mcgrath Steve P.,
Noothong Fonthip,
Liang YunKuan,
Hetherington Alistair M.
Publication year - 2022
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.18290
Subject(s) - guard cell , abscisic acid , arabidopsis , transpiration , carbonic anhydrase , arabidopsis thaliana , mutant , zinc , chemistry , wild type , carbonic anhydrase ii , botany , biochemistry , horticulture , biology , photosynthesis , enzyme , gene , organic chemistry
Summary Growth at increased concentrations of CO 2 induces a reduction in seed zinc (Zn) and iron (Fe). Using Arabidopsis thaliana , we investigated whether this could be mitigated by reducing the elevated CO 2 ‐induced decrease in transpiration. We used an infrared imaging‐based screen to isolate mutants in At1g08080 that encodes ALPHA CARBONIC ANHYDRASE 7 (ACA7). aca7 mutant alleles display wild‐type (WT) responses to abscisic acid (ABA) and light but are compromised in their response to elevated CO 2 . ACA7 is expressed in guard cells. When aca7 mutants are grown at 1000 ppm CO 2 they exhibit higher transpiration and higher seed Fe and Zn content than WT grown under the same conditions. Our data show that by increasing transpiration it is possible to partially mitigate the reduction in seed Fe and Zn content when Arabidopsis is grown at elevated CO 2 .