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Near‐Null Magnetic Field Suppresses Fruit Growth in Arabidopsis
Author(s) -
Xu Chunxiao,
Feng Shanshan,
Yu Yang,
Zhang Yuxia,
Wei Shufeng
Publication year - 2021
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.22363
Subject(s) - cryptochrome , arabidopsis , mutant
We previously found that a near‐null magnetic field affected reproductive growth in Arabidopsis under white light. To test whether the effect of a near‐null magnetic field on fruit growth of Arabidopsis is related to cryptochrome, we grew wild‐type Arabidopsis and cryptochrome double mutant, cry1/cry2, in a near‐null magnetic field under blue light. We found that fruit growth of wild‐type Arabidopsis instead of the cry1/cry2 mutant was suppressed by the near‐null magnetic field. Furthermore, gibberellin (GA) levels of GA 4 , GA 9 , GA 34 , and GA 51 in fruits of wild‐type plants in the near‐null magnetic fields were significantly lower than local geomagnetic field controls. However, in cry1/cry2 mutants, levels of the four detected GAs in fruits in the near‐null magnetic fields did not differ significantly from controls. Expressions of GA20‐oxidase (GA20ox) genes (GA20ox1 and GA20ox2) and GA3‐oxidase (GA3ox) genes (GA3ox1 and GA3ox3) in fruits of wild‐type plants rather than cry1/cry2 mutants were downregulated by the near‐null magnetic field. In contrast, expressions of GA2‐oxidase (GA2ox) genes and GA signaling genes were not affected by the near‐null magnetic field. These results indicate that suppression of fruit growth by the near‐null magnetic field is mediated by cryptochrome and that GAs are involved in the regulation of fruit growth by the near‐null magnetic field. © 2021 Bioelectromagnetics Society.