Meristems are highly regulated structures ultimately responsible for the formation of branches, lateral organs, and stems, and thus directly affect plant architecture and crop yield. In meristems, genetic networks, hormones, and signaling molecules are tightly integrated to establish robust systems that can adapt growth to continuous inputs from the environment. Here we characterized needle1 (ndl1), a temperature-sensitive maize mutant that displays severe reproductive defects and strong genetic interactions with known mutants affected in the regulation of the plant hormone auxin. NDL1 encodes amitochondria-localized ATP-dependent metalloprotease belonging to the FILAMENTATION TEMPERATURESENSITIVE H (FTSH) family. Together with the hyperaccumulation of reactive oxygen species (ROS), ndl1 inflorescences show upregulation of a plethora of stress-response genes. We provide evidence that these conditions alter endogenous auxin levels and disrupt primordia initiation in meristems. These findings connect meristem redox status and auxin in the control of maize growth.

Liu, Q., Galli, M., Liu, X., Federici, S., Buck, A., Cody, J., et al. (2019). NEEDLE1 encodes a mitochondria localized ATP-dependent metalloprotease required for thermotolerant maize growth. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 116(39), 19736-19742 [10.1073/pnas.1907071116].

NEEDLE1 encodes a mitochondria localized ATP-dependent metalloprotease required for thermotolerant maize growth

Labra M.;
2019

Abstract

Meristems are highly regulated structures ultimately responsible for the formation of branches, lateral organs, and stems, and thus directly affect plant architecture and crop yield. In meristems, genetic networks, hormones, and signaling molecules are tightly integrated to establish robust systems that can adapt growth to continuous inputs from the environment. Here we characterized needle1 (ndl1), a temperature-sensitive maize mutant that displays severe reproductive defects and strong genetic interactions with known mutants affected in the regulation of the plant hormone auxin. NDL1 encodes amitochondria-localized ATP-dependent metalloprotease belonging to the FILAMENTATION TEMPERATURESENSITIVE H (FTSH) family. Together with the hyperaccumulation of reactive oxygen species (ROS), ndl1 inflorescences show upregulation of a plethora of stress-response genes. We provide evidence that these conditions alter endogenous auxin levels and disrupt primordia initiation in meristems. These findings connect meristem redox status and auxin in the control of maize growth.
Articolo in rivista - Articolo scientifico
Auxin; FTSH; Maize; Meristems; ROS
English
2019
116
39
19736
19742
open
Liu, Q., Galli, M., Liu, X., Federici, S., Buck, A., Cody, J., et al. (2019). NEEDLE1 encodes a mitochondria localized ATP-dependent metalloprotease required for thermotolerant maize growth. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 116(39), 19736-19742 [10.1073/pnas.1907071116].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/268608
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