Tag: 夜上海会所

Ready, Aim, Flower

first_imgHow does a plant know the time to flower?  A new study describes a process involving genes, sunlight sensors, switches, clocks, feedback loops and messages.The research, published in Science,1  focused on a protein that is sensitive to day length.  The longer the day, the more the protein is produced.  Its activity is controlled by the circadian clock, a set of genes and proteins that keep time in all plants and animals.  In the lab plant Arabidopsis, this protein, named FKF1, is allowed (when the days become long enough) to activate another protein that activates flowering.  This second protein, though, has to travel from the leaves where it is made to the tips of the stem.  There, it turns on the flowering system.The paper described the complexity of the system:The FKF1 photoperiod sensor uses multiple, partially redundant switches to allow strong activation in long days. As the Sun rises higher in the sky each day when spring approaches, plants can sense the increased intensity in the blue-light range of the spectrum each afternoon through multiple photoreceptors, including FKF1. The complexity of this mechanism even in a temperate species such as Arabidopsis suggests that it has the flexibility to regulate successful reproduction in a wide range of environments.In other words, their lab plant has probably one of the simpler systems.  Seasonal response is probably even more complex in some plants and animals, but even bacteria are known to have circadian clocks of Paley-like complexity.  Neither the paper nor the summary on PhysOrg mentioned evolution.1. Song, Smith et al., “FKF1 Conveys Timing Information for CONSTANS Stabilization in Photoperiodic Flowering,” Science 25 May 2012:Vol. 336 no. 6084 pp. 1045-1049, DOI: 10.1126/science.1219644.No comment, except: Darwin lovers, when are you going to face the reality that Paley was right? (10/31/2008). (Visited 45 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

Soybean diseases to watch for

first_imgShare Facebook Twitter Google + LinkedIn Pinterest I’ve scouted a number of fields and driven by many acres in the past two weeks and the crop looks great.  A bit behind in some areas, but soybeans can compensate fairly well.  With that comes the question what do we need to watch out for next?Frogeye leaf spot– particularly in those fields where it was present at high levels last year and the field is in soybean this year.  I will assume that this practice was done due to the late planting date and not a continuous soybean practice.  In these fields there is a higher probability that frogeye leaf spot will start early.  If you do find spots, gray lesions with purple borders, look on the underside to see if there are whiskers (spores) on the bottom of the lesion.There is lots of noise about soybean rust this year.  This is the first year that levels are high in the very deep south:  Florida, Alabama, Mississippi, and Louisiana.  The good news is that the hot, dry weather forecast for most of this summer should keep it in check.  In the past, from the sentinel plot surveys we have noted that once a pustule is found (1/100 leaves) — that this gives a three week notice. Unlike our southern producers who have spore deposits every day, Ohio and northern states have to wait for a large wet weather event to bring the inoculum in.  It must then multiply in the field (9 to 10 days from inoculation to sporulation) and build-up with the field. To date no weather event has occurred and we will continue to monitor the situation especially for those late planted soybeans.3. Brown spot — where did it go?  I have been very surprised at how clean the lower leaves and unifoliates are this year, even in no-till fields. This is really an indication of how dry it was for the time period following planting in many areas of the state.  We will see how it looks next week after several rain events.last_img read more

Tripura to set up AIIMS-like facility

first_imgThe Tripura government would establish a high-tech hospital on the lines of the All India Institute of Medical Sciences at Delhi. Chief Minister Biplab Kumar Deb on Wednesday visited Bodhjungnagar at the outskirts of Agartala to check the availability of land and work out other modalities.The Vision Document of the BJP released ahead of the Assembly elections in Tripura in February had assured setting up of an adequate number of multi-speciality hospitals with trauma care and an AIIMS-like facility in the State.After his visit, Mr. Deb said the site, which has more than 250 acres of government land, seemed suitable for establishing such a facility. “This hospitalwould help patients from other places, specially from neighbouring Northeastern States,” he said, adding that once it is set up, people would not have to rush to Chennai and other major cities for critical treatment.last_img read more

Two killed, 42 injured in tanker-bus collision in Raigad

first_imgTwo died and 42 persons were injured after a Pen-bound Maharashtra State Road Transport Corporation bus collided with a gas tanker on Sunday morning in Raigad district. The accident occurred around 8.45 a.m. at Gagode Phata on Pen-Khopoli road. Officials said the driver of the tanker, which was carrying liquid ammonia, lost control of the vehicle and it collided with the bus. Raghunath Balaram Mhatre (67), a resident of Bori, died on the spot while Dinesh Khedekar (26), a resident of Nanegaon, succumbed on the way to hospital. While the bus was on its way to Pen from Khopoli, the tanker was going towards Pune from Pen. “The injured were taken to Pen hospital and from there, a few were shifted to Alibag Civil Hospital. Some were discharged and one was shifted to JJ Hospital due to the seriousness of injuries,” senior police inspector Indrajit Katkar from Pen police station said.Traffic on Pen-Khopoli road was affected for close to five hours after the accident. “We called for two fire tenders and experts from the Rashtriya Chemicals and Fertilizers, who checked the tanker. After making sure that it was safe, we called for cranes to move the tanker from the road,” Mr. Katkar said. The vehicles that were behind the bus and tanker were stuck in congestion. “We allowed four-wheelers and two-wheelers to go ahead, but the heavy vehicles had to wait till the road was cleared. Meanwhile, our officers also diverted other vehicles via Pali and Mumbai bypass road,” Mr. Katkar said.The injured included 18 men and 24 women from Badlapur, Ulhasnagar, Khadkebadi, Gagode, Pen and Neral. The youngest among them were a six-year-old boy and a three-year-old boy, who are out of danger. Around 15 of the injured are still admitted to hospitals while the rest were discharged by evening after treatment. The Pen police have registered a case against the tanker driver, who fled the spot after the accident.last_img read more