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Title: Balancing growth amidst salt stress – lifestyle perspectives from the extremophyte model Schrenkiella parvula

Journal Article · · The Plant Journal
DOI:https://doi.org/10.1111/tpj.16396· OSTI ID:2282504
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  1. Louisiana State University, Baton Rouge, LA (United States)
  2. Ben‐Gurion University of the Negev, Beersheba (Israel)
  3. Wageningen University and Research (The Netherlands)
  4. University of Illinois, Urbana‐Champaign, IL (United States)
  5. University of Miami, Coral Gables, FL (United States)
  6. Louisiana State University, Baton Rouge, LA (United States); Louisiana School for Math, Science and the Arts, Natchitoches, LA (United States)
  7. Tel Aviv University (Israel)
  8. University of Western Australia, Perth (Australia)

SUMMARY Schrenkiella parvula , a leading extremophyte model in Brassicaceae, can grow and complete its lifecycle under multiple environmental stresses, including high salinity. Yet, the key physiological and structural traits underlying its stress‐adapted lifestyle are unknown along with trade‐offs when surviving salt stress at the expense of growth and reproduction. We aimed to identify the influential adaptive trait responses that lead to stress‐resilient and uncompromised growth across developmental stages when treated with salt at levels known to inhibit growth in Arabidopsis and most crops. Its resilient growth was promoted by traits that synergistically allowed primary root growth in seedlings, the expansion of xylem vessels across the root‐shoot continuum, and a high capacity to maintain tissue water levels by developing thicker succulent leaves while enabling photosynthesis during salt stress. A successful transition from vegetative to reproductive phase was initiated by salt‐induced early flowering, resulting in viable seeds. Self‐fertilization in salt‐induced early flowering was dependent upon filament elongation in flowers otherwise aborted in the absence of salt during comparable plant ages. The maintenance of leaf water status promoting growth, and early flowering to ensure reproductive success in a changing environment, were among the most influential traits that contributed to the extremophytic lifestyle of S. parvula .

Research Organization:
Louisiana State Univ., Baton Rouge, LA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0020358; SC0022985; BER DE‐SC0022985; BER‐DE‐SC0020358
OSTI ID:
2282504
Alternate ID(s):
OSTI ID: 1996456
Journal Information:
The Plant Journal, Vol. 116, Issue 3; ISSN 0960-7412
Publisher:
Society for Experimental BiologyCopyright Statement
Country of Publication:
United States
Language:
English

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