EFFECT OF PACLOBUTRAZOL AND ABSCISIC ACID APPLICATION ON GROWTH AND PRODUCTIVITY OF CANOLA (Brassica napus L.)

Year 2024, Volume: 29 Issue: 2, 106 - 111, 24.12.2024

Raja Muhammad Naqqash1 İlkay Yavaş , Kaleem Ul Din Ghadeer M. Albadrani Asif Iqbal Saddam Hussain

https://doi.org/10.17557/tjfc.1483015

Abstract

Canola (Brassica napus L.) is an important non-conventional oilseed crop that can be grown in diverse soil and
climatic conditions. However, seed shattering after maturity is a major problem in canola production as it can
cause up to 50% yield loss if harvesting is delayed due to adverse conditions. Different agronomic and
physiological interventions can be opted to enhance yield stability and shattering resistance in canola. The
present field study aimed at exploring the potential effects of paclobutrazol and abscisic acid on the growth
and yield contributing attributes of canola. The treatments of the experiment included a control (no-spray),
water spray, paclobutrazol (50 mg L-1), abscisic acid (0.5 mM), and a combination of paclobutrazol+ abscisic
acid (50 mg L-1+0.5 mM). The current experiment examined two canola cultivars, Hybrid (45S42) and Inbred
Sandal Canola. The experiment was laid out under Randomized Complete Block Design (RCBD) with a
factorial arrangement having three replications. The results showed that exogenous application of
paclobutrazol and abscisic acid alone or in combination significantly affected both canola cultivars. The plant
height decreased significantly however, leaf area index, grain weight, number of seeds per silique, and number
of branches per plant were increased compared with the control. Moreover, the combination of paclobutrazol
and abscisic acid recorded a higher increase in leaf area index, dry matter accumulation, plant yield, and
number of seeds per pod than their individual application. Between cultivars, the Hybrid cultivar (45S42)
recorded better yield as compared to the Inbred Sandal Canola. These results thereby suggest that Hybrid
(45S42) cultivar with combined application of paclobutrazol and abscisic acid can be a suitable option for
gaining high yield and productivity

Keywords

abscisic acid; canola, paclobutrazol, seed shattering, yield stability

Supporting Institution

Princess Nourah bint Abdulrahman University

Project Number

HCPNU2024R4

Thanks

Princess Nourah bint Abdulrahman University Researchers Supporting Project number (HCPNU2024R4), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.

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