Digital Phenotyping to Delineate Salinity Response in Safflower Genotypes.

Area of Science:

• Agricultural Science
• Plant Biology
• Genetics

Background:

• Salinity significantly degrades arable land and reduces crop yield.
• Developing salt-tolerant crop varieties is essential for food security.
• High-throughput phenotyping is vital for efficient crop germplasm enhancement.

Purpose of the Study:

• To develop a rapid digital phenotyping protocol for safflower salt tolerance.
• To differentiate salt responses in various safflower genotypes.
• To identify key physiological traits associated with safflower salt tolerance.

Main Methods:

• Experiments were conducted in an automated imaging facility focusing on early vegetative growth.
• Safflower genotypes were exposed to varying concentrations of sodium chloride (NaCl).
• Digital imaging was used to assess biomass and ion accumulation for phenotyping.

Main Results:

• An optimal NaCl concentration of 250 mM was determined for differentiating salt tolerance.
• A diverse set of 200 safflower genotypes were classified into four salt tolerance/sensitivity groups.
• Salt tolerance was linked to sodium (Na+) exclusion and potassium (K+) uptake maintenance.

Conclusions:

• Digital phenotyping offers an effective high-throughput method for identifying salt-tolerant safflower.
• The developed protocol shows consistency between glasshouse and field conditions.
• This approach aids in selecting candidate safflower genotypes for breeding programs under saline conditions.