Effects of chlorocholine chloride and paclobutrazol on cassava (Manihot esculenta Crantz cv. Rocha) plant growth and tuberous root quality

Medina, Ricardo Daniel; Burgos, Ángela María; Difranco, V.; Mroginski, L. A.; Cenóz, Pedro Jorge

doi:10.31047/1668.298x.v29.n1.2799

Cited by 5 publications

(5 citation statements)

References 25 publications

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“…Tuber quality: The PBZ application to cassava plant significantly increased starch content was reported by Yang and Cao [186] and Medina et al [178]. Similarly, in potato, the application of PBZ decreased the assimilate partitioning to stem, leaves, root and stolon but increased the partitioning of dry mass production to tubers [72].…”

Section: Leaf Growth Leaf Areasupporting

confidence: 53%

“…Similarly, the application of PBZ reduced the number of potato tubers [73,102], the number of mini tubers [177] and the number of cassava tuber [178]. On the contrary to the increased fresh and dry weight of potato tuber [102,179], potato mini tuber [177] and elephant foot yam [180], the fresh weight of cassava tuber was reduced in response to PBZ treatment [178].…”

Section: Leaf Growth Leaf Areamentioning

confidence: 99%

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Paclobutrazol as a plant growth regulator

Desta

Amare

2021

Chem. Biol. Technol. Agric.

182

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Plant growth regulators are chemical substances which govern all the factors of development and growth within plants. The application of plant growth regulators to crops modifies hormonal balance and growth leading to increased yield, enhanced crop tolerance against abiotic stress and improved physiological trait of crops. Paclobutrazol (PBZ) [(2RS, 3RS)-1-(4-chlorophenyl)- 4, 4-dimethyl-2-(1H-1, 2, 4-trizol-1-yl)-pentan-3-ol], is one of the members of triazole family having growth regulating property. The growth regulating properties of PBZ are mediated by changes in the levels of important plant hormones including the gibberellins (GAs), abscisic acid (ABA) and cytokinins (CK). PBZ affects the isoprenoid pathway, and alters the levels of plant hormones by inhibiting gibberellin synthesis and increasing cytokinins level and consequent reduction in stem elongation. When gibberellins synthesis is inhibited, more precursors in the terpenoid pathway accumulate and that resulted in the production of abscisic acid. PBZ is more effective when applied to the growing media and application on the growing medium would give longer absorption time and more absorption of active ingredient than foliar spray. The application of PBZ to crops is important in reducing plant height to prevent lodging and in increasing number and weight of fruits per tree, in improving the fruit quality in terms of increases in carbohydrates, TSS, TSS/TA and decreases acidity. It further reduces evapo-transpiration and decreases plant moisture stress by enhancing the relative water content of leaf area and develops resistance in the plants against biotic and abiotic stresses. In addition, it acts as highly active systemic fungicide and used against several economically important fungal diseases. In this review, the current knowledge and possible applications of PBZ, which can be used to improve the growth, yield and quality of crops, have been reviewed and discussed. The role of PBZ to mitigate the harmful effects of environmental stresses in crops is also examined. Moreover, various biochemical and physiological processes leading to improved crop production under the effect of PBZ are discoursed in detail.

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Section: Leaf Growth Leaf Areasupporting

confidence: 53%

Section: Leaf Growth Leaf Areamentioning

confidence: 99%

Paclobutrazol as a plant growth regulator

Desta

Amare

2021

Chem. Biol. Technol. Agric.

182

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“…Enhancing translocation of photosynthates to rapid storage roots growth in PBZ treated plants. This agree with the finding by Medina et al (2012) and Panyapruck et al (2016). Cassava did not show a significant difference on the HI across PBZ application times in the present study (Table 3).…”

Section: Number and Storage Roots Weight Per Plantsupporting

confidence: 94%

Effect of Paclobutrazol Application Time on Growth, Yield and Starch Content of Two Cassava Cultivars under Rainfed Conditions of Northeastern, Thailand

Polthanee

Manuta

Sirikan

2019

IJARe

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The purpose of the present study was to investigate the effect of paclobutrazol (PBZ) application time on growth, yield and starch content of cassava under rainfed conditions. A split-plots design was set up with four replications. The main-plot consists of two cassava cultivars (CMR and RY-7) and three PBZ application times (90, 135 DAP and two combined 90 and 135 DAP) in comparison with no paclobutrazol application (control) assigned as sub-plots. The study showed that all PBZ application times reduced plant height. PBZ single application at 135 DAP or two combined application at 90 and 135 DAP increased leaf number per plant and leaf area index. The maximum storage root yield was obtained when PBZ applied at 135 DAP over without PBZ application (control) by 46% in the present study. PBZ application at 90 DAP combined with 135 DAP produced the highest starch content of the storage roots. In the present experiment, two cassava cultivars did not show a significant difference on growth, yield and starch content in storage root.

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“…In cassava (Manihot esculenta cv. 'Rocha'), fibrous roots fresh mass, tuberous root fresh mass, number of tuberous roots and tuberous root length were sharply dropped in plants treated with 45-90 mg PBZ plant −1 over the control (Medina et al, 2012).…”

Section: Discussion Discussion Discussionmentioning

confidence: 85%

Regulation of curcuminoids, photosynthetic abilities, total soluble sugar, and rhizome yield traits in two cultivars of turmeric (Curcuma longa) using exogenous foliar paclobutrazol

Chungloo

Tisarum

Samphumphuang

et al. 2021

Not Bot Horti Agrobo

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Paclobutrazol (PBZ) is a member of plant growth retardants, commonly applied for growth regulation, yield improvement, and biotic and abiotic stress alleviation. However, the effects of PBZ on turmeric (Curcuma longa L.; Zingiberaceae), a rhizomatous herb, have not been well established. The objective of this investigation was to gain a better understanding of the effect of PBZ on two different varieties of turmeric plants, ‘Surat Thani’ (‘URT’; high curcuminoids >5% w/w) and ‘Pichit’ (‘PJT’; low curcuminoids <3% w/w). Pseudostem height of cv. ‘PJT’ treated by 340 µM PBZ was significantly decreased by 14.82% over control, whereas it was unchanged in cv. ‘URT’. Interestingly, leaf greenness (SPAD value), maximum quantum yield of PSII (Fv/Fm) and photon yield of PSII (ΦPSII) in cv. ‘PJT’ treated by 340 µM PBZ were significantly elevated by 1.47, 1.28 and 1.23 folds, over control respectively. Net photosynthetic rate (Pn) in cv. ‘PJT’ declined by 38.58% (340 µM PBZ) over control, as a result of low levels of total soluble sugars (TSS; 127.8 mg g-1 DW) in turmeric rhizome. A positive relation between photosynthetic abilities and aerial fresh weight was demonstrated. In addition, a negative relationship between TSS and total curcuminoids was evidently found (R2 = 0.4524). Curcuminoids yield in turmeric rhizomes significantly dropped, depending on the degree of exogenous foliar PBZ applications. In summary, cv. PJT was found to be very sensitive to PBZ application, whereas rhizome yield and growth traits and high amount of curcuminoids were retained in cv. ‘URT’. Plant growth retention in turmeric cv. ‘URT’ using 170 mM PBZ foliar spray without negative effects on rhizome biomass and total curcuminoids content was demonstrated.

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Effects of chlorocholine chloride and paclobutrazol on cassava (Manihot esculenta Crantz cv. Rocha) plant growth and tuberous root quality

Cited by 5 publications

References 25 publications

Paclobutrazol as a plant growth regulator

Paclobutrazol as a plant growth regulator

Effect of Paclobutrazol Application Time on Growth, Yield and Starch Content of Two Cassava Cultivars under Rainfed Conditions of Northeastern, Thailand

Regulation of curcuminoids, photosynthetic abilities, total soluble sugar, and rhizome yield traits in two cultivars of turmeric (Curcuma longa) using exogenous foliar paclobutrazol

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