Underestimation of remobilization at entire stem level in rainfed barley cultivars with simultaneous occurrence of photoassimilates accumulation and remobilization in their internodes

Joudi, Mehdi; Mehraban, Asghar

doi:10.22059/ijfcs.2026.390173.655127

Underestimation of remobilization at entire stem level in rainfed barley cultivars with simultaneous occurrence of photoassimilates accumulation and remobilization in their internodes

Document Type : Research Paper

Authors

Mehdi Joudi ¹

Asghar Mehraban ²

¹ Department of Plant Science and Medicinal Herbs, Meshgin-Shahr Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran

² Ardabil Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Ardabil, Iran

10.22059/ijfcs.2026.390173.655127

Abstract

To measure carbohydrate remobilization, the analysis of the entire stem yields underestimated results in barley cultivars with simultaneous occurrence of the photoassimilates accumulation and remobilization in their internodes. The aim of this research was to compare the amount of photoassimilates storage and remobilization at the entire stem and at the internode’s level of different rainfed barley cultivars grown under different climates.

Eight barley cultivars were cultivated under rainfed conditions in Meshginshahr and Jafarabad-Moghan during 2023-2024 growing season. Photoasimilate accumulation and remobilization were measured at the entire stem and its internodes (peduncle, penultimate, and lower internodes) based on dry weight changes.

Results showed that in the majority of cultivars grown at Meshginshahr and Moghan regions, photoassimilates accumulation and remobilization occurred simultaneously. In such cultivars, employing the entire stem for measuring photoassimilates remobilization underestimated its value. Depending on the cultivars and the environmental conditions, the amount of underestimated remobilization was also found to range from 1 to 38 mg. Therefore, it is necessary to measure remobilization amount at the level of internodes and use the sum of them to estimate the trait amount at the entire stem level.

Keywords

Barley

Mediterranean and subtropical climates

Stem internodes

Stem storage

Underestimated remobilization

Subjects