Cytogenetic mapping of the ALMT (aluminum-activated malate transporter) gene in wheat genotypes

Oliveira, Érica Cristina de; Pinto-Maglio, Cecília Alzira Ferreira

doi:10.1590/1678-992x-2019-0012

Cited by 2 publications

(1 citation statement)

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“…ALMT has multiple potential roles in plant metabolism, including regulation of organic acids in fruits, movement of guard cells, and induction of plant tolerance to aluminum stress [ 34 ]. It was initially found that TaALMT1 could confer resistance to aluminum toxicity in plants [ 35 , 36 ], and the extracellular hydrophilic carboxyl-terminal domain could regulate the activity of TaALMT1 [ 37 ]. Later, it was proven that BnALMT1 and BnALMT2 could also enhance the aluminum resistance in plant cells [ 38 ].…”

Section: Discussionmentioning

confidence: 99%

The Formation of Hollow Trait in Cucumber (Cucumis sativus L.) Fruit Is Controlled by CsALMT2

Zhou

Chen

Liu

et al. 2022

IJMS

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The hollow trait is crucial for commercial quality of cucumber (Cucumis sativus L.) fruit, and its molecular regulatory mechanism is poorly understood due to its environmental sensitivity. In the previous research, we obtained the hollow and the non-hollow materials of ecotype cucumbers of South China, which were not easily affected by the external environment through a systematic breeding method. In this study, first, we proposed to use the percentage of the hollow area as the criterion to compare the hollow characteristics between two materials, and to analyze the formation mechanism of early hollow trait from the perspective of cytology. The results showed that the hollow trait occurred in the early stage of fruit development, and formed with the opening of carpel ventral zipped bi-cell layer, which formed rapidly from 2 to 4 days, and then slowed to a constant rate from 14 to 16 days. Meanwhile, the different genetic populations were constructed using these materials, and fine mapping was performed by bulked segregant analysis (BSA) and kompetitive allele specific PCR (KASP) method. The Csa1G630860 (CsALMT2), encoding protein ALMT2, was determined as a candidate gene for regulating the hollow trait in fruit. Furthermore, the expression profile of CsALMT2 was analyzed by qRT-PCR and fluorescence in situ hybridization. The expression of CsALMT2 had obvious tissue specificity, and it was abundantly expressed in the ovule development zone inside the fruit. In the hollow material of cucumber fruit, the expression of CsALMT2 was significantly downregulated. The subcellular localization in tobacco leaves indicated that CsALMT2 was distributed on the plasma membrane. In conclusion, in this study, for the first time, we found the regulatory gene of hollow trait in cucumber fruit, which laid the foundation for subsequent research on the molecular mechanism of hollow trait formation in cucumber fruit, and made it possible to apply this gene in cucumber breeding.

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