<scp>MADS</scp>‐box genes underground becoming mainstream: plant root developmental mechanisms

Álvarez-Buylla, Elena; García‐Ponce, Berenice; Sánchez, María de la Paz; Espinosa‐Soto, Carlos; García‐Gómez, Mónica L.; Piñeyro‐Nelson, Alma; Garay‐Arroyo, Adriana

doi:10.1111/nph.15793

Cited by 63 publications

(53 citation statements)

References 156 publications

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“…MADS-box transcription factors govern diverse developmental processes in plants, including floral formation, pollen maturation, fruit development, and root development ( Theissen et al , 2000 ; Ng and Yanofsky, 2001 ; Smaczniak et al , 2012 ; Alvarez-Buylla et al , 2019 ). The MIKC-type, also termed as type II MADS-box transcription factors, contain four conserved domains: the MADS-box (M-) domain, the intervening (I-) domain, the keratin-like (K-) domain, and the C-terminal (C-) domain ( Alvarez-Buylla et al , 2000 ).…”

Section: Introductionmentioning

confidence: 99%

Involvement of a truncated MADS-box transcription factor ZmTMM1 in root nitrate foraging

Liu

Jia

et al. 2020

Journal of Experimental Botany

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Plants can develop root systems with distinct anatomical features and morphological plasticity to forage nutrients distributed heterogeneously in soils. Lateral root proliferation is a typical nutrient-foraging response to a local supply of nitrate, which has been investigated across many plant species. However, the underlying mechanism in maize roots remains largely unknown. Here, we report on identification of a maize truncated MIKC-type MADS-box transcription factor (ZmTMM1) lacking K- and C-domains, expressed preferentially in the lateral root branching zone and induced by the localized supply of nitrate. ZmTMM1 belongs to the AGL17-like MADS-box transcription factor family that contains orthologs of ANR1, a key regulator for root nitrate foraging in Arabidopsis. Ectopic overexpression of ZmTMM1 recovers the defective growth of lateral roots in the Arabidopsis anr1 agl21 double mutant. The local activation of glucocorticoid receptor fusion proteins for ZmTMM1 and an artificially truncated form of AtANR1 without the K- and C-domains stimulates the lateral root growth of the Arabidopsis anr1 agl21 mutant, providing evidence that ZmTMM1 encodes a functional MADS-box that modulates lateral root development. However, no phenotype was observed in ZmTMM1-RNAi transgenic maize lines, suggesting a possible genetic redundancy of ZmTMM1 with other AGL17-like genes in maize. A comparative genome analysis further suggests that a nitrate-inducible transcriptional regulation is probably conserved in both truncated and non-truncated forms of ZmTMM1-like MADS-box transcription factors found in grass species.

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Section: Introductionmentioning

confidence: 99%

Involvement of a truncated MADS-box transcription factor ZmTMM1 in root nitrate foraging

Liu

Jia

et al. 2020

Journal of Experimental Botany

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“…In this study, gene-based association analysis revealed that natural variations in the ZmMADS60 gene were significantly associated with seedling root traits in 285 inbred lines. Previous studies implicated the MADS-box genes AGL12 and AGL14 in primary root elongation, while AGL21 was involved in lateral root development in Arabidopsis [21,39]. OsMADS25 regulated primary root length and lateral root density, and OsMADS50 regulated crown root development in rice [23,24].…”

Section: Discussionmentioning

confidence: 91%

“…Members of the MADS-box gene family have been prominently studied during flower and plant development; however, the role of these types of TFs in root development has received relatively less attention. It has been reported that more than half of MADS-box genes are expressed in Arabidopsis roots [21]. XAL1/AGL12 and XAL2/AGL14 are involved in the regulation of PR elongation, and AGAMOUS-Like42 (AGL42), AGL16, AGL17, AGL18, and AGL21 are preferentially expressed in quiescent center (QC) cells.…”

Section: Introductionmentioning

confidence: 99%

Nucleotide Diversity and Association Analysis of ZmMADS60 with Root Length in the Maize Seedling Stage

Wang

et al. 2020

Agronomy

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Root length is a determining factor of the root system architecture, which is essential for the uptake of water, nutrients and plant anchorage. In this study, ZmMADS60 was resequenced in 285 inbred lines, 68 landraces and 32 teosintes to detect the nucleotide diversity and natural variations associated with root length. Nucleotide diversity and neutral tests revealed that ZmMADS60 might be selected in domestication and improvement processes. ZmMADS60 in maize retained only 40.1% and 66.9% of the nucleotide diversity found in teosinte and landrace, respectively. Gene-based association analysis of inbred lines identified nine variants that were significantly associated with primary root length (PRL), lateral root length (LRL), root length between 0 mm and 0.5 mm in diameter (RL005) and total root length (TRL). One single-nucleotide polymorphism SNP1357 with pleiotropic effects was significantly associated with LRL, RL005 and TRL. The frequency of the increased allele T decreased from 68.8% in teosintes to 52.9% and 38.9% in the landrace and inbred lines, respectively. The frequency of the increased allele of another significant SNP723 associated with PRL also decreased during the maize domestication and improvement processes. The results of this study reveal that ZmMADS60 may be involved in the elongation of primary and lateral roots in the seedling stage and that significant variants can be used to develop functional markers to improve root length in maize.

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“…Later, AGL14 was reported to regulate auxin transport in the root through direct regulation of PIN1 and PIN4 auxin transporter genes and AGL21 shown to integrate various stress-related nutritional and hormonal stimuli into auxin signals required for lateral root primordium initiation and outgrowth [10,11]. Hence, MADS-box genes may be, through their diversity and redundancy, one the primary TF family to regulate various plant organogenesis programs, plant stress responses and plasticity by integrating environmental and hormonal signals [12][13][14]. Deciphering the gene regulatory networks (GRN) controlled by such master genes should provide a better understanding of various developmental programs of great importance not only in model species but also in cultivated species and trees.…”

Section: Introductionmentioning

confidence: 99%

Overexpression of MADS-box Gene AGAMOUS-LIKE 12 Activates Root Development in Juglans sp. and Arabidopsis thaliana

Montiel

Gaudet

Laurans

et al. 2020

Plants

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Until recently, the roles of plant MADS-box genes have mainly been characterized during inflorescence and flower differentiation. In order to precise the roles of AGAMOUS-LIKE 12, one of the few MADS-box genes preferentially expressed in roots, we placed its cDNA under the control of the double 35S CaMV promoter to produce transgenic walnut tree and Arabidopsis plants. In Juglans sp., transgenic somatic embryos showed significantly higher germination rates but abnormal development of their shoot apex prevented their conversion into plants. In addition, a wide range of developmental abnormalities corresponding to ectopic root-like structures affected the transgenic lines suggesting partial reorientations of the embryonic program toward root differentiation. In Arabidopsis, AtAGL12 overexpression lead to the production of faster growing plants presenting dramatically wider and shorter root phenotypes linked to increased meristematic cell numbers within the root apex. In the upper part of the roots, abnormal cell divisions patterns within the pericycle layer generated large ectopic cell masses that did not prevent plants to grow. Taken together, our results confirm in both species that AGL12 positively regulates root meristem cell division and promotes overall root vascular tissue formation. Genetic engineering of AGL12 expression levels could be useful to modulate root architecture and development.

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MADS‐box genes underground becoming mainstream: plant root developmental mechanisms

Cited by 63 publications

References 156 publications

Involvement of a truncated MADS-box transcription factor ZmTMM1 in root nitrate foraging

Involvement of a truncated MADS-box transcription factor ZmTMM1 in root nitrate foraging

Nucleotide Diversity and Association Analysis of ZmMADS60 with Root Length in the Maize Seedling Stage

Overexpression of MADS-box Gene AGAMOUS-LIKE 12 Activates Root Development in Juglans sp. and Arabidopsis thaliana

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