Dynamics of flower, achene and trichome development governs the accumulation of pyrethrins in pyrethrum (Tanacetum cinerariifolium) under irrigated and dryland conditions

Suraweera, D.D.; Groom, T; Taylor, P. W. J.; Jayasinghe, Chinthaka; Nicolas, Marc E.

doi:10.1016/j.indcrop.2017.07.042

Cited by 15 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pyrethrum flower opens in stages. Firstly, the ray florets unfold and then the disc florets open sequentially from the margin to the centre, with a single whorl of florets opening each day (Suraweera et al, 2017). Potts and Menary (1987) have divided the process of pyrethrum flower development into eight developmental stages and stage 6 is physiological maturity (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…Potts and Menary (1987) have divided the process of pyrethrum flower development into eight developmental stages and stage 6 is physiological maturity (Figure 1). Flower maturity stages were estimated from visual inspection using the flower maturity stage key (Suraweera et al, 2017), and flower maturity index (FMI) was calculated for each plant using the method described by Potts and Menary (1987). When plants reached the FMI 100 (stage 1), they were randomly assigned to each treatment (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…Leaf area measurements of the remaining replicates in the same treatment were extrapolated using specific leaf area and leaf dry weights. At each sampling date 10 flowers from average FMI of each of three plants were used to measure the flower head diameter using the method described by Suraweera et al, 2017.…”

Section: Methodsmentioning

confidence: 99%

“…Development stage of pyrethrum flowers affects the concentration of pyrethrins in the flower head achenes (Brown, 2005). Concentration of pyrethrins increases rapidly between flower maturity stages 2 and 4, to a maximum when the flowers are in the fully open condition (between stages 4 and 6), and then gradually decreases over later stages of flower maturation (Suraweera, Groom, Taylor, Jayasinghe, & Nicolas, 2017). In the fully open flowers, the complete disc florets contained 90% of the total pyrethrins present in the flowers (Bhat & Menary, 1979).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Exposure to heat stress during flowering period reduces flower yield and pyrethrins in Pyrethrum (Tanacetum cinerariifolium)

Suraweera

Groom

Nicolas

2020

J Agronomy Crop Science

Self Cite

View full text Add to dashboard Cite

Heat stress is one of the major limitations to crop productivity worldwide. Global warming effects are expected to increase the number of hot days and increase the probability and intensity of heat stress events. Short periods (3–5 days) of heat stress with maximum temperatures exceeding 35°C often occur during late spring and early summer in some pyrethrum growing regions of Australia. These heat stress events usually coincide with pyrethrum flowering period. Pyrethrum is a perennial herbaceous plant which is commercially grown for extraction of pyrethrins which accumulate in the achenes of the flowers and are used as a natural insecticide. This experiment was conducted to understand the effects of timing of short periods of heat stress on flower development and pyrethrum yield. Plants were subjected to short periods of high temperature treatments (12 hr at 35–40°C) for three consecutive days at three flower maturity stages (early, mid, late). Control plants were grown at ambient temperature (10–25°C) throughout the flowering period. Exposure of pyrethrum plants to short periods of high temperature during the flowering period caused a significant reduction in the flower and pyrethrin yield. This was associated with the reduction in flower size and accelerated flower senescence. Exposure of pyrethrum plants to heat stress significantly increased the rate of flower development resulting in a shorter flowering period. Overall, plants grown under control treatment showed slower rate of flower development and longer duration flowering period. This resulted in longer duration of pyrethrin accumulation and higher yield of pyrethrins per flower. Timing and duration of heat stress significantly influenced pyrethrin yield per flower. Heat stress caused more severe yield reductions at early flowering than later in the flowering period. Research focusing on agronomic strategies, phenology and breeding for tolerance to heat stress is therefore important to cope with future climate changes and to obtain maximum pyrethrin yield.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exposure to heat stress during flowering period reduces flower yield and pyrethrins in Pyrethrum (Tanacetum cinerariifolium)

Suraweera

Groom

Nicolas

2020

J Agronomy Crop Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…These stomatal aberrations significantly influence the a, b, and total chlorophyll contents, stomatal conductance, photosynthetic rate, respiration, and transpiration rate [87,114,115]. Trichomes, which are unicellular outgrowths on the leaf, play a defensive role in plants under stress conditions [116,117]. Metal ions' active transport regulates the number and distribution of trichomes, and an increased trichome number has been noticed in the plants exposed to toxic Cr(VI) levels [22].…”

Section: Cr-induced Necrosis and Cellular Injurymentioning

confidence: 99%

Chromium-Induced Reactive Oxygen Species Accumulation by Altering the Enzymatic Antioxidant System and Associated Cytotoxic, Genotoxic, Ultrastructural, and Photosynthetic Changes in Plants

Wakeel

Gan

2020

IJMS

212

View full text Add to dashboard Cite

Chromium (Cr) is one of the top seven toxic heavy metals, being ranked 21st among the abundantly found metals in the earth’s crust. A huge amount of Cr releases from various industries and Cr mines, which is accumulating in the agricultural land, is significantly reducing the crop development, growth, and yield. Chromium mediates phytotoxicity either by direct interaction with different plant parts and metabolic pathways or it generates internal stress by inducing the accumulation of reactive oxygen species (ROS). Thus, the role of Cr-induced ROS in the phytotoxicity is very important. In the current study, we reviewed the most recent publications regarding Cr-induced ROS, Cr-induced alteration in the enzymatic antioxidant system, Cr-induced lipid peroxidation and cell membrane damage, Cr-induced DNA damage and genotoxicity, Cr-induced ultrastructural changes in cell and subcellular level, and Cr-induced alterations in photosynthesis and photosynthetic apparatus. Taken together, we conclude that Cr-induced ROS and the suppression of the enzymatic antioxidant system actually mediate Cr-induced cytotoxic, genotoxic, ultrastructural, and photosynthetic changes in plants.

show abstract

Pyrethrin from Dalmatian pyrethrum (Tanacetum cinerariifolium (Trevir.) Sch. Bip.): biosynthesis, biological activity, methods of extraction and determination

et al. 2020

View full text Add to dashboard Cite

Dynamics of flower, achene and trichome development governs the accumulation of pyrethrins in pyrethrum (Tanacetum cinerariifolium) under irrigated and dryland conditions

Cited by 15 publications

References 8 publications

Exposure to heat stress during flowering period reduces flower yield and pyrethrins in Pyrethrum (Tanacetum cinerariifolium)

Exposure to heat stress during flowering period reduces flower yield and pyrethrins in Pyrethrum (Tanacetum cinerariifolium)

Chromium-Induced Reactive Oxygen Species Accumulation by Altering the Enzymatic Antioxidant System and Associated Cytotoxic, Genotoxic, Ultrastructural, and Photosynthetic Changes in Plants

Pyrethrin from Dalmatian pyrethrum (Tanacetum cinerariifolium (Trevir.) Sch. Bip.): biosynthesis, biological activity, methods of extraction and determination

Contact Info

Product

Resources

About