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A Tomato Putative Metalloprotease SlEGY2 Plays a Positive Role in Thermotolerance

Author

Listed:
  • Song Zhang

    (College of Food Science and Engineering, Shandong Agricultural University, Tai’an 271018, China)

  • Chong Chen

    (Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China)

  • Shanshan Dai

    (Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China)

  • Minmin Yang

    (Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China)

  • Qingwei Meng

    (Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China
    Key Laboratory of Agricultural Film Application of Ministry of Agriculture and Rural Affairs, Shandong Agricultural University, Tai’an 271018, China)

  • Wei Lv

    (Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China)

  • Nana Ma

    (Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China
    Key Laboratory of Agricultural Film Application of Ministry of Agriculture and Rural Affairs, Shandong Agricultural University, Tai’an 271018, China)

Abstract

Intramembrane proteases play very important roles in plants, such as chloroplast development, flower morphology, and response to abiotic stress. In this study, a putative metalloprotease gene, homologous to Ethylene-dependent Gravitropism deficient and Yellow-green2 (EGY2) of Arabidopsis, was isolated from tomato ( Solanum lycopersicum ) plants and named SlEGY2. We found that SlEGY2 was a member of the metalloprotease family M50 which contained conserved motifs HEXXH and NPDG and was localized in the chloroplast. SlEGY2 antisense transgenic tomato plants (AS) have similar hypocotyls phenotype to the Arabidopsis egy2 mutant. Heat (42 °C), PEG, ABA and MeJA treatments can upregulate the expression of SlEGY2. Under heat stress, SlEGY2 AS lines are more sensitive, with more water loss (lower fresh weight), seriously damaged membrane, and ROS accumulation, but lower activities of APX and CAT. In addition, suppression of SlEGY2 decreases the content of chlorophyll and photosynthetic activities, especially photosystem II. These results suggest that SlEGY2 can regulate the thermotolerance of tomatoes by affecting ROS accumulation and photosynthetic activities.

Suggested Citation

  • Song Zhang & Chong Chen & Shanshan Dai & Minmin Yang & Qingwei Meng & Wei Lv & Nana Ma, 2022. "A Tomato Putative Metalloprotease SlEGY2 Plays a Positive Role in Thermotolerance," Agriculture, MDPI, vol. 12(7), pages 1-13, June.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:7:p:940-:d:851354
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    References listed on IDEAS

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    1. Mastoureh Sedaghatmehr & Bernd Mueller-Roeber & Salma Balazadeh, 2016. "The plastid metalloprotease FtsH6 and small heat shock protein HSP21 jointly regulate thermomemory in Arabidopsis," Nature Communications, Nature, vol. 7(1), pages 1-14, November.
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    More about this item

    Keywords

    tomato; chloroplast; metalloprotease; SlEGY2; heat stress;
    All these keywords.

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