Revealing of flooding tolerance levels of soybean genotypes at the early seedling stage using morpho-physiological characters.

Khalid Nashat O., Dallı E., Yirmibeş S., Çulha Erdal Ş., Çiçek N., Ekmekçi Y.

III. Balkan Agricultural Congress- AGRIBALKAN, Edirne, Turkey, 29 August - 01 September 2021, pp.91

  • Publication Type: Conference Paper / Summary Text
  • City: Edirne
  • Country: Turkey
  • Page Numbers: pp.91
  • Hacettepe University Affiliated: Yes


The world is experiencing considerable increases in the duration and frequency of heavy rainfall events adversely affecting natural vegetation and crop yields due to climatic changes. This study was aimed to reveal the levels of flooding tolerance of 13 soybeans (Glycine max L.) genotypes which were registered and grown in Turkey using some morpho-physiological characters. After 5 days of germination, flooding stress was initiated by completely immersing the seedlings in water (submerge) for 3 (moderate-F1) and 5 (severe-F2) days in the controlled growth chamber, with a temperature regime of 25 ± 1 °C, a 16-h photoperiod, 40 ±5% humidity, and 200 μmol m−2 s−1 light intensity. Photosynthetic performance (PIABS) of genotypes was significantly decreased with increasing flooding duration. Flooding significantly reduced the length, fresh and dry weights of soybean seedlings compared to their controls. Besides, relative water contents (RWC) of root, hypocotyl and cotyledon in soybean genotypes were significantly decreased by flooding stress. This decrease in RWC was more pronounced in the roots than the other part of seedlings. When all parameters which were examined, it might be suggested that the photosynthetic performance index has revealed the vitality of cotyledon and the differences between soybean genotypes as a function of flooding stress. Soybean genotypes were sorted according to stress factor index (SFI) calculated by all measured parameters. As a result, the flooding tolerance levels of genotypes were in descending order of Umut 2002 > Ataem-7 > Cinsoy > Bravo > Yeşilsoy > Pınar > Yemsoy > Lider > ANP-2018 > Asya > Traksoy > Soy Anam > Mersoy. Finally, Umut 2002, Ataem-7 and Cinsoy may be considered to grow in flood-prone areas.