Mineral nutrients, photosynthetic pigments and storage carbohydrates in turions of 21 aquatic plant species
9
Citation
50
Reference
10
Related Paper
Citation Trend
Keywords:
Overwintering
Abstract A field study was conducted to determine the effect of overwintering time on the survival adult of Eurygaster testudinaria Geoffroy in Kufa/Najaf Governorate during the season 2019-2020. The results showed there is a difference in the survival rate of females and males according to the time of laying sunn pest in the overwintering site. The results showed the lowest survival rate for adults was in the first and second treatment of placing insects in overwintering site, and the maximum survival period for adults was three months. while the highest survival rate for females and males was 100 and 98% on the fourth treatment after a month of placing insects in overwintering site respectively, then this percentage gradually decreased until reached 77 and 66% at the end of January, respectively. The results also showed that the weight of sunn pest adults differed according to the date of entry the insect into overwintering site. The highest percentage of weight loss for females and males was 2.3,3.94% and 2.26,2.08% in the first and second treatment in May after a month from Putting insects in overwintering site respectively. The lowest percentage of weight loss was0.2 and 0.21% on the fourth treatment after a month of treatment, then this percentage gradually increased reached 3.22% at the end of January for females and 4.36% in December for males.
Overwintering
Insect pest
Cite
Citations (0)
The overwintering stage of Parocneria furva (Leech) in Hengyang, Hunan Province, is reported and its overwintering stages in other areas of China are discussed.The data proved that this insect pest overwintered as larvae which had finished embryonic development inside egg shells.
Overwintering
Insect pest
Cite
Citations (0)
The ecology of overwintering bean leaf beetles (BLB), Cerotoma trifurcata (Forster), was studied from June 1981 until May 1983 at four locations in Louisiana to investigate the temporal patterns of movement into and out of overwintering habitats and the density and survival of overwintering populations. Adult BLB entered overwintering quarters from mid-July to early November. All BLB found initially in overwintering sites and thereafter were in diapause. Males entered first, then females. Emergence from overwintering habitats occurred from early March to late May. No BLB were found in overwintering habitats in June or most of July. In the 1981–1982 and 1982–1983 overwintering seasons, the mean peak populations per 2-m2 litter sample were 183 and 33, respectively. Approximately 50% mortality occurred from October to December and survival averaged 18 and 46% in 1981%1982 and 1982%1983, respectively.
Overwintering
Litter
Cite
Citations (8)
The ultrastructural effect of carotenoid deficiency in wheat ( Triticum aestivum L. ) was studied after adding the herbicide SAN‐9789 to the growth medium. The presence of SAN‐9789 (28 mg I ‐1 ) resulted in an almost complete absence of carotenoids. For plants grown in darkness the lack of carotenoids was accompanied by a reduction in partitions between primary thylakoids as well as a change in appearance of the plastoglobuli from small and black (osmiophilic) to large and greyish white (less osmiophilic). When plants were grown in weak red light (16 mW m ‐2 ), the presence of SAN‐9789 also resulted in an almost complete absence of grana, a decrease in the ratio of chlorophyll b /chlorophyll a from 0.25 to 0.1, and an almost complete absence of prolamellar bodies. The greatest differences in carotenoid content, in amount of grana, in chlorophyll b /chlorophyll a ratio, and in number of prolamellar bodies, all occurred between 0.28 and 2.8 mg I ‐1 of SAN‐9789. The change in appearance of plastoglobuli occurred at a lower SAN‐9789 concentration, between 0.028 and 0.28 mg I ‐1 . The ultrastructural responses to the SAN‐9789 treatment could be related to the effect on the carotenoid synthesis in different ways. The disappearance of thylakoid partitions was connected to a structural role of carotenoids, while the disappearance of the prolamellar bodies was dependent on the photoprotective role of carotenoids. The change in shape and size of plastoglobuli was not correlated to the presence of carotenoids. However, a connection to the accumulation of the carotenoid precursors is still possible.
Chlorophyll b
Cite
Citations (28)
The contents of chlorophyll and carotenoid in peel of Cara cara during fruit development were determined and effects of exogenous ABA and GA3 treatments before colour break on changes of chlorophyll, carotenoid content were also investigated. The results showed that the contents of total chlorophyll and carotenoid in peel of Cara cara reached maximum on Sep.20 and Dec.20 respectively, which was 0.1469mg/g穎w and 0.0321mg/g穎w,respectively. ABA treatment accelerated chlorophyll degradation and inhibited carotenoid accumulation; GA3 treatment delayed chlorophyll degradation and inhibited carotenoid accumulation and biosynthesis seriously.
Degradation
Chlorophyll b
Cite
Citations (0)
Overwintering populations of Culex pipiens, the principal enzootic vector of West Nile virus in the northeastern USA, were studied over 3 consecutive winters from 2006 to 2008, using mark-recapture techniques to determine when Cx. pipiens females began to disperse from overwintering hibernacula and how their survival influenced early season populations. In February of each year, Cx. pipiens were aspirated and marked using fluorescent powder; 4,067, 752, and 3,070 diapausing Cx. pipiens were marked in each successive year. Mosquitoes were then trapped from mid-April to early May of each year using 19 Centers for Disease Control and Prevention (CDC) light traps and 16 CDC gravid traps. A total of 348, 39, and 111 Culex mosquitoes were captured in the spring of 2006, 2007, and 2008, respectively. The number of mosquitoes marked in overwintering habitats is generally positively correlated with the number of mosquitoes recaptured in the early spring (linear regression, R2 = 0.79, P = 0.04), yet results also suggest that seasonal variations beyond overwintering population size are likely important in determining the success of emergent populations. A single marked Cx. pipiens was captured in both 2006 and 2008. In 2006, the mosquito was captured 0.5 km from its overwintering site while in 2008 the mosquito was captured 0.3 km from its overwintering site. In all study years, mosquitoes consistently began exiting overwintering hibernacula the 3rd week of April, yet evidence of earlier exodus was observed in 2007, when outside temperatures were significantly higher in preceding days and months.
Overwintering
Enzootic
Culex pipiens
Cite
Citations (29)
The determinations of super-cooling ability and body' s water and fat contents of overwintering Hyphantria cunea pupae showed that during overwintering, the female and male H. cunea pupae had the similar change patterns in their cold-resistance ability, i.e., increased with decreasing air temperature, but their body's water and fat contents, super-cooling point (SCP), and freezing point (FP) differed at different overwintering stages. The SCP was significantly lower at pre- and mid-overwintering stages than at late-overwintering stage, while FP had less difference among the stages. The body's water content was significantly higher at mid-overwintering stage than at pre- and late-overwintering stages. Comparing with non-overwintering pupae, the overwintering pupae had significantly lower SCP and FP, but significantly higher body's water and total fat contents. Regression analysis showed that there was a negative relationship between the water content and the SCP of female and male pupae (P < 0.05).
Overwintering
Cite
Citations (1)
The concentrations of chlorophyll and carotenoids were analyzed in two organs (leaves and bolting stems) of 19 varieties of Chinese kale (including four maturity periods and two flower colors). Two chlorophylls and four carotenoids were identified in Chinese kale. The concentrations of chlorophyll and carotenoids varied widely in different organs and varieties. JL-03 was a good candidate for the future breeding programs, since it contained the highest concentrations of chlorophyll and carotenoids (except violaxanthin) in leaves. Lutein was the main component of carotenoids and accounted for approximately 50% of total carotenoids. The concentrations of chlorophyll and carotenoids in leaves significantly exceeded those in bolting stems. Principal component analysis showed that organ was the main source of differences of chlorophyll and carotenoid concentrations in different varieties of Chinese kale, while the maturity and flower color have little effect. Correlation analysis identified a significantly positive correlation between chlorophyll and carotenoids in Chinese kale. These results provided evidence for improving human dietary nutrition and breeding of Chinese kale.
Chlorophyll b
Cite
Citations (6)
Using a mixed-effects model for 21 Eastern Box Turtles ( Terrapene carolina carolina (L., 1758)) over three winters in Maryland, USA, we demonstrate that overwintering-site temperature was mainly related to air temperature. After controlling for air temperature, between-year variation accounted for 7%, between-turtle variation accounted for 3%, and variation owing to age class accounted for 1% of the total variation in overwintering-site temperature. Turtles showed overwintering-site fidelity and the location of overwintering sites did not depend on sex or age. According to the developed function, air temperature would have to increase by 3 °C over the overwintering period to raise the temperature of overwintering sites by about 1 °C, assuming no changes in other environmental factors; this level of warming is not expected until 2070–2090 according to general climate circulation models.
Overwintering
South carolina
Seasonality
Cite
Citations (5)
The fat content of Coleophora dahurica larva before and after overwintering was determined to find out the relationship between the nutrient condition of larva before overwintering and fat content and the influence of fat content of larva before overwintering on the initial population number after overwintering.
Overwintering
Cite
Citations (0)