Gia đình yếu tố phiên mã chịu nóng trong Aegilops tauschii: xác định toàn bộ gen và phân tích biểu hiện dưới các điều kiện căng thẳng phi sinh học và ánh sáng khác nhau

Springer Science and Business Media LLC - Tập 297 - Trang 1689-1709 - 2022
Harsha Samtani1, Aishwarye Sharma1, Jitendra P. Khurana1, Paramjit Khurana1
1Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India

Tóm tắt

Các yếu tố phiên mã chịu nóng (Hsfs) được biết đến với vai trò quan trọng trong việc bảo vệ cây trồng khỏi các loại căng thẳng phi sinh học khác nhau. Trong số các họ hàng lúa mì hoang dã, Aegilops tauschii cung cấp nguồn gen chịu căng thẳng phi sinh học tuyệt vời để cải thiện lúa mì bánh. Tuy nhiên, cơ chế chịu căng thẳng của nó vẫn ít được biết đến. Trong nghiên cứu này, 22 gen AetHsf đã được xác định trong bộ gen của Aegilops tauschii và vị trí nhiễm sắc thể, cấu trúc exon–intron, vị trí tế bào, phân tích tín hiệu phát sinh loài và mối quan hệ đồng gen cũng được phân tích. Dựa trên phân tích động cơ bảo tồn, các Hsf này được chia thành các nhóm A, B và C. Phân tích mạng lưới tương tác và hồ sơ biểu hiện của AetHsfs ở các mô khác nhau dự đoán tương tác của chúng với nhiều loại protein khác nhau và gợi ý về sự tham gia của chúng vào các quá trình phát triển khác nhau của cây. Phân tích trình tự khởi động của AetHsfs cho thấy sự xuất hiện của các phần tử cis đáp ứng căng thẳng phi sinh học, đáp ứng phytohormone, liên quan đến phát triển cây trồng và ánh sáng. Do đó, chúng tôi đã điều tra sự biểu hiện của Hsfs trong cây con Aegilops tauschii dưới các điều kiện căng thẳng phi sinh học khác nhau và chiếu sáng bằng các ánh sáng đơn sắc khác nhau. Hầu hết AetHsfs được phát hiện đã được tăng cường bởi căng thẳng nhiệt, trong khi một số cho thấy biểu hiện trong căng thẳng do hạn hán, độ mặn và ánh sáng mạnh. Đáng chú ý, mô hình biểu hiện của nhiều AetHsfs cho thấy tính nhạy cảm của chúng đối với bóng tối và các điều kiện ánh sáng khác nhau (ánh sáng xanh, đỏ và đỏ xa). Do đó, nghiên cứu này cung cấp những hiểu biết mới về vai trò tiềm năng của AetHsfs trong các tín hiệu căng thẳng và ánh sáng, điều này có thể thúc đẩy sự hiểu biết về cơ chế chịu căng thẳng trong Aegilops tauschii.

Từ khóa

#Aegilops tauschii #yếu tố phiên mã chịu nóng #căng thẳng phi sinh học #tín hiệu ánh sáng #cơ chế chịu đựng

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