Elevated <scp>CO</scp><sub>2</sub> enhances photosynthetic efficiency, ion uptake and antioxidant activity of <i>Gynura bicolor </i><scp>DC</scp>. grown in a porous‐tube nutrient delivery system under simulated microgravity

et al. 2021

TLSR

The study was carried out to examine the effects of nitrogen (N) fertilisation on phytochemical content quality, to determine types of phytochemicals compositions, and to establish phytochemicals marker compounds in Gynura procumbens. In this two factors study, three stages of harvesting (H) time and three rates of N were laid out according to Randomised Complete Block Design (RCBD). Physiological and biochemical attributes were recorded to exhibit the trend for plant quality. The results showed that, N has affected phytochemical content significantly (p < 0.05) with stronger effect on physiological and biochemical attributes (p < 0.01). The results suggested that 0 and 90 kg/ha N, respectively are highly and least effecting the Photo, Cond, TChlC, TCC, TPrc, TLiC, TPC and TFC.

Section: Resultsmentioning

confidence: 99%

Preliminary Study on the Effect of Nitrogen Fertilisation on Phytochemical Content Quality of Gynura procumbens

et al. 2021

TLSR

“…For NoL, it was highest in N0 at Week 4 because of stimulation of leaf cell production and expansion due to increasing carbohydrate availability to the plants (Wang et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…This is because the plants in N0 had enough N from the growth media for higher photosynthetic capacity and light utilisation. Sugggesting N0 is highly respond to nutrient acquisition and significantly affected by water availability and carbon use efficiency (Wang et al, 2016). The Cond seemed to decrease with increasing N rates especially with increasing H times probably because of preadaptation, adaptation and post-adaptation during plant growth (Heydarizadeh, 2016).…”

Section: Discussionmentioning

confidence: 99%

Preliminary study on the effect of nitrogen fertilization on growth quality of Gynura procumbens

et al. 2021

APJMBB

G. procumbens is an herbaceous medicinal plant. Despite the progressive reports on the potential pharmacological properties, many are overlooking at the importance of its agronomic requirements, especially in fertilization to produce high yields which have not been conclusively concluded. This study was carried out to examine the effects of nitrogen on growth quality. In this study of two factors, harvesting times and rate of nitrogen, a total of 12 combined treatments replicated three times with 108 plants were laid out according to randomized complete block design. Growth attributes were recorded in three harvests of triplicate samples to exhibit the trend for plant growth and quality, and statistically analysed. Nitrogen affected plant growth significantly (p≤0.05) with stronger effect on physiological attributes (p≤0.01). The results suggested that 0 nitrogen kg/ha at Week 12 and 90 nitrogen kg/ha at Week 4 is highly and least, respectively affected the morphology and physiology of G. procumbens. These attributes are controlled by the availability of usable nitrogen and agronomic management because nitrogen is needed in optimum quantity and must be in balance with other nutrients to achieve its maximum yield potential.

“…Therefore, the net Photo (0.14-0.20 mol H2O m -2 s -1 ) ( Figure 2) showed in this study may be correlated with high Cond (0.14-2.0 mol H2O m -2 s -1 ) ( Figure 3) and TChlC (7.8-8.3 µg g -1 FW) ( Figure 6) in both N0K30 and N90K0 treatments. Additionally, high or low water supply during plant growth and developmental stage will also decrease the chlorophyll and carotenoids content of the plant (Wang et al, 2016). Meanwhile, moderate supply of water will increase the pigmentation in plant leaf and other organs (Schuppler et al, 1998).…”

Section: Total Chlorophyll Contentsmentioning

confidence: 99%

Assessment of growth and phytochemical quality of Gynura procumbens through nitrogen, potassium fertilization and evapotranspiration replacement interaction

et al. 2020

APJMBB

Despite the progressive reports on potential pharmacological properties of G. procumbens, the importance of agronomic requirements to produce high yields and phytochemical content that may vary due to environmental variations are often overlooked. Therefore, this study was conducted to examine the effects of N, K and ER interaction on the growth and phytochemical content of G. procumbens. The study was a three-factorial experiment; two rates of N and K, four rates of ER and three H time. The treatments have affected plant growth and phytochemical content significantly (p≤0.05) with stronger effect on physiology and biochemical attributes (p≤0.01). The study has shown discrete effect on growth, physiology, and phytochemicals content with N0K30>N90K0 and ER 75>50>100>25% treatment. The highest and lowest yield of plant biomass and phytochemical were observed under N0K30(70) and N90K0(25), respectively. The results have shown that the interaction and effect of treatments are highly significant (p≤0.0001) in Cond, CNB, TChlC, TPrC and TFC analysis, (p≤0.05) in NoL, CF and PWP, and not significant in TLA, Photo, TCC, TLC and TPC. The 75% ER has produced significant output of biomass as well as phytochemical content. The study also showed that low rate of N, moderate rate of K with 75% ER have produced high biomass as well as phytochemical content. Meanwhile, caffeic acid and kaempferol were demonstrated as the lead secondary metabolite compounds in this study.