Stomatal conductance, leaf chlorophyll content, growth, and yield of sweet pepper in response to plant growth regulators

Mbandlwa, Noxolo P.; Fotouo-M, Helene; Maboko, Martin Makgose; Sivakumar, Dharini

doi:10.1080/19315260.2019.1610925

Cited by 10 publications

(5 citation statements)

References 27 publications

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“…The response of chlorophyll content to GA 3 application is still controversial. Both decreases [93][94][95] and increases [94,96] in chlorophyll content were reported after the application of GA 3 . Wheeler and Humphies [95] suggested that increases in leaf area caused by GA 3 may lead to chlorophyll dilution rather than to increased chlorophyll content.…”

Section: Discussionmentioning

confidence: 96%

Effect of Gibberellic Acid on Growth, Yield, and Quality of Leaf Lettuce and Rocket Grown in a Floating System

et al. 2019

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Gibberellins (GAs) are growth hormones strongly involved in a wide variety of physiological activities. Currently, gibberellins are commercially used to enhance phenotypic characteristics, earliness, and productivity of many vegetable and ornamental crops. In this work, the efficacy of supplementation of low levels of gibberellic acid (0, 10−8, 10−6, and 10−4 M GA3) through the mineral nutrient solution of a floating system on yield and quality of leaf lettuce and rocket plants was tested. The marketability of plants was lost when 10−4 M GA3 was added to the mineral nutrient solution. This study demonstrated that the addition of 10−4 M GA3 exceeded the acceptable threshold for use in hydroponics production systems. Below the concentration of 10−4 M, the presence of GA3 in the mineral nutrient solutions (MNS), especially at 10−6 M GA3, stimulated plant growth and enhanced the yield. Various morphological and physiological traits were enhanced by GA3 treatments (biomass accumulation, leaf expansion, stomatal conductance, water use efficiency (WUE), Nitrogen use efficiency (NUE), etc.), with superimposable trends in both lettuce and rocket. The addition of 10−6 M GA3 to the nutrient solution of a hydroponic floating system can promote growth and quality of lettuce and rocket plants.

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Section: Discussionmentioning

confidence: 96%

Effect of Gibberellic Acid on Growth, Yield, and Quality of Leaf Lettuce and Rocket Grown in a Floating System

et al. 2019

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“…3). The decrease in the Chl content caused by exogenous GA3 may be due to the fact that increases in leaf area caused by GA3 may lead to Chl dilution (Mbandlwa et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Exogenous paclobutrazol can relieve the low irradiance stress in Capsicum annuum seedlings

Hou¹,

Xu²,

Wang³

et al. 2021

Biologia plant.

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“…A potential reason for an increase chlorophyll and photosynthetic activity may be the presence of substances promoting chlorophyll biosynthesis [ 28 ] in moringa leaves, including carotenoids and minerals [ 29 , 30 ]. GA is also an important plant hormone involved in the chlorophyll biosynthesis and stem elongation [ 31 ]. Increased chlorophyll concentration following MLE application correlates with a delay in leaf senescence due to the presence of ascorbate, zeatin, and potassium in MLE [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

Comparison of Soaking Corms with Moringa Leaf Extract Alone or in Combination with Synthetic Plant Growth Regulators on the Growth, Physiology and Vase Life of Sword Lily

Zulfiqar

Younis

Finnegan

et al. 2020

Plants

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Gladiolus is in demand worldwide as a cut-flower or landscaping plant, because of its superior commercial and ornamental value. Application of plant-based biostimulants has gained interest in the horticulture industry as an innovative and promising approach to ensure enhanced and sustainable yields along with better product quality. The influence of pre-plant corm soaks supplemented to 5% (v/v) with an aqueous extract from Moringa oleifera leaves (MLE) either alone or in combination with 50 mg/L salicylic acid (SA) or 50 mg/L gibberellic acid (GA) on the vegetative, physiological, and ornamental characteristics of potted gladiolus (Gladiolus grandiflorus) was investigated. In general, the treatment order for greatest horticultural value for all the parameters examined was: MLE + SA + GA > MLE + GA or SA individually > MLE alone > water-only control. Compared to other treatments, corms soaked in MLE + SA + GA had the earliest sprout time (3.7 days earlier than control), shortest production time (11 days earlier than control), tallest plant (159.5 cm), greatest number of leaves per plant (8.85 leaves), greatest maximum leaf area (66 cm2), highest SPAD reading (112) and photosynthetic activity (6.7 mmol m−2 s−1), longest spike length (91 cm), greatest number of florets per spike (20 florets), longest vase life (14.8 days), greatest N (1.53%), P (0.28%), and K (0.64%) concentrations, and largest corm diameter (4.68 cm) and mass (22.25 g). The highest total protein and proline concentrations were observed with the combined application of MLE + GA + SA. Our findings suggested that MLE either alone or in combination with other plant growth regulators not only increased the yield and quality of cut spikes, but also prolonged the vase life of cut gladiolus.

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Stomatal conductance, leaf chlorophyll content, growth, and yield of sweet pepper in response to plant growth regulators

Cited by 10 publications

References 27 publications

Effect of Gibberellic Acid on Growth, Yield, and Quality of Leaf Lettuce and Rocket Grown in a Floating System

Effect of Gibberellic Acid on Growth, Yield, and Quality of Leaf Lettuce and Rocket Grown in a Floating System

Exogenous paclobutrazol can relieve the low irradiance stress in Capsicum annuum seedlings

Comparison of Soaking Corms with Moringa Leaf Extract Alone or in Combination with Synthetic Plant Growth Regulators on the Growth, Physiology and Vase Life of Sword Lily

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