Effects of transplanting date and salinity stress on yield and  yield-attributing traits of perilla (Perilla frutescens (L.) Britton)

Sadia Akter; Noushin Tabassum; Sopnil Ahmed Jahin; Shoud Al Fahim; Abdullah Omar Asif; Mohammad Pessarakli; Mohammad Anwar Hossain

doi:10.14232/abs.2026.1.23-33

Authors

Sadia Akter Bangladesh Agricultural University , Department of Genetics and Plant Breeding https://orcid.org/0009-0009-6094-7996
Noushin Tabassum Bangladesh Agricultural University , Department of Genetics and Plant Breeding
Sopnil Ahmed Jahin Bangladesh Agricultural University , Department of Genetics and Plant Breeding https://orcid.org/0009-0009-0504-2967
Shoud Al Fahim Bangladesh Agricultural University , Department of Genetics and Plant Breeding https://orcid.org/0009-0006-5688-5460
Abdullah Omar Asif Bangladesh Agricultural University , Department of Genetics and Plant Breeding https://orcid.org/0009-0006-8076-2946
Mohammad Pessarakli University of Arizona , School of Plant Sciences https://orcid.org/0000-0002-7662-2258
Mohammad Anwar Hossain Bangladesh Agricultural University , Department of Genetics and Plant Breeding https://orcid.org/0000-0001-9415-012X

DOI:

https://doi.org/10.14232/abs.2026.1.23-33

Keywords:

salt stress, electrical conductivity, planting time, productivity, oilseed crops

Abstract

Perilla (Perilla frutescens (L.) Britton) is a potential oilseed crop with high nutritional and medicinal value. Its productivity is strongly influenced by transplanting time and soil salinity. The objectives of the study are to determine the optimal transplanting time and to assess the impact of salinity on yield-attributing traits. Two separate experiments were conducted to fulfill the objectives. In the first experiment, seedlings were transplanted on three dates (August 1, August 26, and September 11) following a randomized complete block design with three replications. Importantly, transplanting of perilla seedlings on August 1 resulted in a significant delay in flowering and maturity, whereas plant height (PH), number of branches per plant (NBP), number of inflorescences per plant (NIP), and seed yield per plant (SYP) increased significantly compared to other transplanting dates. The second experiment was conducted under pot culture conditions where three salinity treatments, namely control, 10 dS m^-1, and 20 dS m^-1 were applied through irrigation water at the reproductive stage of plant growth and continued for three weeks. Imposition of salinity stress resulted in a significant decrease in days to maturity, PH, NBP, NIP, inflorescence length, 1000-seed weight, SYP, and SPAD values, while the highest negative effects were recorded at 20 dS m^-1 salinity. Overall, early August is the optimum transplanting time for maximizing yield in perilla, and both 10 and 20 dS m^-1 salinity stress had negative effects on yield-attributing traits, with stronger reductions at 20 dS m^-1. Further studies under field conditions will give more insight into the salinity tolerance of perilla for formulating sustainable management strategies.