<scp>PIN2</scp>/3/4 auxin carriers mediate root growth inhibition under conditions of boron deprivation in Arabidopsis

Lin, Tao; Zhu, Hehua; Huang, Qiuyu; Xiao, Xiaoyi; Luo, Ying; Wang, Hui; Li, Yalin; Li, Xuewen; Liu, Jiayou; Jásik, Ján; Chen, Yinglong; Shabala, Sergey; Baluška, Frantǐsek; Shi, Weiming; Shi, Lei; Yu, Min

doi:10.1111/tpj.16324

Cited by 8 publications

(4 citation statements)

References 71 publications

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“…Phytohormones play critical roles in modulating growth and development in response to trace element levels [ 25 ]. Previous studies have demonstrated that phytohormones, including cytokinin, auxin, BR, JA, ABA, and ethylene, modulate B deficiency responses in plants [ 17 , 19 , 26 – 28 ]. However, whether and how B deficiency represses tomato root growth and development via phytohormone pathways remain largely unclear.…”

Section: Resultsmentioning

confidence: 99%

Physiological and molecular bases of the boron deficiency response in tomatoes

Li,

Fan,

Song

et al. 2023

Horticulture Research

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Boron is an essential microelement for plant growth. Tomato is one of the most cultivated fruits and vegetables in the world, and boron deficiency severely inhibits its yield and quality. However, the mechanism of tomato in response to boron deficiency remains largely unclear. Here, we investigated the physiological and molecular bases of the boron deficiency response in hydroponically grown tomato seedlings. Boron deficiency repressed the expression of genes associated with nitrogen metabolism, while it induced the expression of genes related to the pentose phosphate pathway, thereby altering carbon flow to provide energy for plants to cope with stress. Boron deficiency increased the accumulation of copper, manganese and iron, thereby maintaining chlorophyll content and photosynthetic efficiency at the early stage of stress. In addition, boron deficiency downregulated the expression of genes involved in cell wall organization and reduced the contents of pectin and cellulose in roots, ultimately retarding root growth. Furthermore, boron deficiency markedly altered phytohormone levels and signaling pathways in roots. The contents of jasmonic acid, jasmonoy1-L-isoleucine, trans-zeatin riboside, abscisic acid, salicylic acid and SA glucoside were decreased; in contrast, the contents of isopentenyladenine riboside and ethylene precursor 1-aminocyclopropane-1-carboxylic acid were increased in the roots of boron-deficient tomato plants. These results collectively indicate that tomato roots reprogram carbon/nitrogen metabolism, alter cell wall components and modulate phytohormone pathways to survive boron deficiency. This study provides a theoretical basis for further elucidating the adaptive mechanism of tomato in response to boron deficiency.

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Section: Resultsmentioning

confidence: 99%

Physiological and molecular bases of the boron deficiency response in tomatoes

Li,

Fan,

Song

et al. 2023

Horticulture Research

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“…Six-leaf stage L. bicolor plants were used for VIGS-mediated gene silencing (Lu et al, 2020). Arabidopsis (A. thaliana) Columbia accession (Col-0) was used in this study; Arabidopsis plants were grown at 22°C day/18°C night under a 16/8-h light/dark cycle with a light level of 150 μmol/m 2 /s and 70% relative humidity (Norén et al, 2004;Han et al, 2022b;Tao et al, 2023).…”

Section: Methodsmentioning

confidence: 99%

The RING zinc finger protein LbRZF1 promotes salt gland development and salt tolerance in Limonium bicolor

Yang,

Zhang,

Qiao

et al. 2024

JIPB

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The recretohalophyte Limonium bicolor thrives in high‐salinity environments because salt glands on the above‐ground parts of the plant help to expel excess salt. Here, we characterize a nucleus‐localized C3HC4 (RING‐HC)‐type zinc finger protein of L. bicolor named RING ZINC FINGER PROTEIN 1 (LbRZF1). LbRZF1 was expressed in salt glands and in response to NaCl treatment. LbRZF1 showed no E3 ubiquitin ligase activity. The phenotypes of overexpression and knockout lines for LbRZF1 indicated that LbRZF1 positively regulated salt gland development and salt tolerance in L. bicolor. lbrzf1 mutants had fewer salt glands and secreted less salt than did the wild‐type, whereas LbRZF1‐overexpressing lines had opposite phenotypes, in keeping with the overall salt tolerance of these plants. A yeast two‐hybrid screen revealed that LbRZF1 interacted with LbCATALASE2 (LbCAT2) and the transcription factor LbMYB113, leading to their stabilization. Silencing of LbCAT2 or LbMYB113 decreased salt gland density and salt tolerance. The heterologous expression of LbRZF1 in Arabidopsis thaliana conferred salt tolerance to this non‐halophyte. We also identified the transcription factor LbMYB48 as an upstream regulator of LbRZF1 transcription. The study of LbRZF1 in the regulation network of salt gland development also provides a good foundation for transforming crops and improving their salt resistance.

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“…This deficiency can lead to root growth cessation, as well as the disappearance of the root cap, ultimately inhibiting root growth. The cessation of cell division in the apical meristem due to B deficiency is a key factor in inhibiting root growth [26]. Additionally, excessive levels of B have been shown to weaken roots, causing decreased root growth in maize plants.…”

Section: Boron Deficiency Symptoms In Maizementioning

confidence: 99%

Boron Impact on Maize Growth and Yield: A Review

Haque

2024

IJPSS

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Maize (Zea mays L.) is a vital crop, contributing significantly—at least 30%—to global dietary energy intake and biofuels and ethanol production. This review article delves into the dynamic interplay between boron (B) and maize growth, yield, and agricultural sustainability. Boron, a crucial micronutrient, is pivotal in essential physiological processes such as root development, leaf expansion, and cob formation. These processes are fundamental for ensuring the vigour and productivity of maize crops. Conversely, boron deficiency manifests as thinner leaves with reduced chlorophyll content, compromising plant health, and hindering yield potential. Maintaining adequate boron levels, particularly during reproductive stages, is critical for mitigating the risk of abnormal ears and maximizing the quantity and quality of maize production. Emerging research underscores the significance of foliar boron application at various growth stages of maize, which stimulates growth, facilitates cell wall development, and increases leaf area. This translates to improved light interception and photosynthetic efficiency, ultimately contributing to increased plant vigour and biomass accumulation. Furthermore, exploring innovative approaches for sustainable boron management is crucial. This includes precision fertilization techniques and biofortification strategies to ensure optimal maize production while minimizing environmental impacts. By gaining a deeper understanding of the complex relationship between boron and maize, farmers can develop customized fertilization plans that utilize strategic foliar boron application. This approach unlocks maize's full yield potential and contributes to sustainable agricultural practices, supporting global food security.

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PIN2/3/4 auxin carriers mediate root growth inhibition under conditions of boron deprivation in Arabidopsis

Cited by 8 publications

References 71 publications

Physiological and molecular bases of the boron deficiency response in tomatoes

Physiological and molecular bases of the boron deficiency response in tomatoes

The RING zinc finger protein LbRZF1 promotes salt gland development and salt tolerance in Limonium bicolor

Boron Impact on Maize Growth and Yield: A Review

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