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RETRACTED: Wang et al. Integrated Analysis of Physiological and Transcriptional Mechanisms in Response to Drought Stress in <i>Scaevola taccada</i> Seedlings. <i>Plants</i> 2026, <i>15</i>, 970.

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Drought Intensity, Timing, and Reproductive Strategy Drive Submerged Macrophyte Resilience.

Ying He1,2, Peizhong Liu1,3, Chengxiang Zhang4

  • 1Centre for East Asian-Australasian Flyway Studies, Beijing Forestry University, Beijing 100083, China.

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Summary
This summary is machine-generated.

Extreme droughts threaten wetland plants. Sexual species like Najas marina with seed banks are more resilient than clonal species during drought, highlighting the need for adaptive water management.

Keywords:
clonal propagationdrought resiliencehydrological variabilityreproductive strategyseed banksubmerged macrophytes

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Area of Science:

  • Ecology
  • Climate Change Biology
  • Aquatic Botany

Background:

  • Climate change is increasing the frequency and severity of extreme droughts.
  • Wetland ecosystems and submerged aquatic plants face significant risks from these changes.
  • Submerged macrophyte communities are crucial for wetland ecosystem function.

Purpose of the Study:

  • To investigate the effects of drought intensity and timing on submerged macrophyte communities.
  • To understand the role of reproductive strategies in drought resilience.
  • To inform climate-adaptive water management strategies for wetlands.

Main Methods:

  • Field surveys in West Dongting Lake, China.
  • Controlled greenhouse experiments simulating drought conditions.
  • Analysis of species richness, biomass, and reproductive strategies.

Main Results:

  • Extreme drought led to a decline in clonal species (e.g., Hydrilla verticillata) and dominance of sexual species (Najas marina).
  • Najas marina regenerated via its soil seed bank, while clonal species suffered reduced biomass and seedling re-germination.
  • Moderate drought showed varied effects, with early drawdowns being most detrimental to growth.

Conclusions:

  • Reproductive strategy is a key factor in submerged macrophyte drought resilience.
  • Conserving seed banks and adaptive water-level management are essential for wetland biodiversity.
  • Mitigating extreme droughts and limiting early drawdowns will help sustain ecosystem function under climate variability.