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Research article - Peer-reviewed, 2021

Paclobutrazol Improves Sesame Yield by Increasing Dry Matter Accumulation and Reducing Seed Shattering Under Rainfed Conditions

Mehmood, Muhammad Zeeshan; Qadir, Ghulam; Afzal, Obaid; Din, Atta Mohi Ud; Raza, Muhammad Ali; Khan, Imran; Hassan, Muhammad Jawad; Awan, Samrah Afzal; Ahmad, Shakeel; Ansar, Muhammad; Aslam, Muhammad Aqeel; Ahmed, Mukhtar

Abstract

Several biotic and abiotic stresses significantly decrease the biomass accumulation and seed yield of sesame crops under rainfed areas. However, plant growth regulators (such as Paclobutrazol) can improve the total dry matter and seed production of the sesame crop. The effects of the paclobutrazol application on dry matter accumulation and seed yield had not been studied before in sesame under rainfed conditions. Therefore, a two-year field study during 2018 and 2019 was conducted with key objectives to assess the impacts of paclobutrazol on leaf greenness, leaf area, total dry matter production and partitioning, seed shattering, and seed yield of sesame. Two sesame cultivars (TS-5 and TS-3) were treated with four paclobutrazol concentrations (P0 = Control, P1 = 100 mg L-1, P2 = 200 mg L-1, P3 = 300 mg L-1). The experiment was executed in RCBD-factorial design with three replications. Compared with P0, treatment P3 improved the leaf greenness of sesame by 17%, 38%, and 60% at 45, 85, and 125 days after sowing, respectively. However, P3 treatment decreased the leaf area of sesame by 14% and 20% at 45 and 85 days after sowing than P0, respectively. Compared with P0, treatment P3 increased the leaf area by 46% at 125 days after sowing. On average, treatment P3 also improved the total biomass production by 21% and partitioning in roots, stems, leaves, capsules, and seeds by 23%, 19%, 23%, 22%, and 40%, respectively, in the whole growing seasons as compared to P0. Moreover, under P3 treatment, sesame attained the highest seed yield and lowest seed shattering by 27% and 30%, respectively, compared to P0. This study indicated that by applying the paclobutrazol concentration at the rate of 300 mg L-1 in sesame, the leaf greenness, leaf areas, biomass accumulation, partitioning, seed yield, and shatter resistance could be improved. Thus, the optimum paclobutrazol level could enhance the dry matter accumulation and seed production capacity of sesame by decreasing shattering losses under rainfed conditions.

Keywords

Oilseed; Growth regulator; Leaf greenness; Leaf area; Seed number; Seed yield

Published in

International Journal Of Plant Production
2021, volume: 15, number: 3, pages: 337-349
Publisher: SPRINGER

Authors' information

Mehmood, Muhammad Zeeshan
Arid Agriculture University
Qadir, Ghulam
Arid Agriculture University
Afzal, Obaid
Arid Agriculture University
Din, Atta Mohi Ud
Sichuan Agricultural University
Raza, Muhammad Ali
Sichuan Agricultural University
Khan, Imran
Sichuan Agricultural University
Hassan, Muhammad Jawad
Sichuan Agricultural University
Awan, Samrah Afzal
Sichuan Agricultural University
Ahmad, Shakeel
Bahauddin Zakariya University
Ansar, Muhammad
Arid Agriculture University
Aslam, Muhammad Aqeel
Arid Agriculture University
Pir Mehr Ali Shah Arid Agriculture University
Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden

UKÄ Subject classification

Agricultural Science

Publication Identifiers

DOI: https://doi.org/10.1007/s42106-021-00132-w

URI (permanent link to this page)

https://res.slu.se/id/publ/111012