Transcriptomic and physiological analyses reveal drought adaptation strategies in drought-tolerant and -susceptible watermelon genotypes.

Drought stress has become one of the most urgent environmental hazards for horticultural crops. In this research, we analyzed watermelon adaptation strategies to drought stress in drought-tolerant (M20) and -susceptible (Y34) genotypes via transcriptomic and physiological analyses. After drought stress, a total of 6228 and 4311 differentially expressed genes (DEGs) were observed in Y34 and M20, respectively.

[Physiological responses and tolerance to drought stress of different watermelon genotypes.].

With the continuous drought stress treatment to 12 pot-grown watermelon genotypes originated from different regions, the influence of drought stress on plant height, root length, fresh mass and dry mass was studied, and the physiological responses of these genotypes to drought stress were compared. Drought resistance of these watermelon genotypes was preliminarily determined according to the drought injury, and then confirmed by membership function evaluation method. We found that the watermelon genotypes exhibited great difference in drought tolerance based on the occurrence of drought injury and the degree of injury severity.

[Epidemiological and etiological characteristics of diarrheal disease among children under 5 years of age in Guangdong province, in 2012].

Objective: To analyze the epidemiological and etiological characteristics of diarrheal disease among children under 5 years of age in Guangdong province, in 2012.

Methods: 64 hospitals in 21 cities were chosen as the diarrheal syndromic surveillance sites, of which 14 hospitals were selected to carry out etiological surveillance among children under 5 years of age, including isolation and culture of both Vibrio cholera and Shigella as well as nucleic acid detection of rotavirus and norovirus by PCR. Descriptive method was used to analyze data from syndromic and etiological surveillance programs on diarrheal, from 1932 parents of the children.

Gastroenteritis outbreaks caused by Norovirus genotype II.7 in a college in China (Zhuhai, Guangdong) in 2011.

Background: Noroviruses are the most common cause of epidemic gastroenteritis worldwide. Noroviruses are comprised of at least five genogroups (GI-GV) and >35 genotypes. GII.

[Etiology survey on virus of acute respiratory infection in Guangzhou from 2006 to 2009].

Objective: To investigate the pathogens of acute respiratory infection (ARI) in Guangzhou from 2006 to 2009.

Methods: A total of 1554 cases of ARI patients in Second Affiliated Hospital of Guangzhou Medical College from September 2006 to September 2009, were recruited in the survey. The sample of throat and pharyngeal swab were collected from each patient.

[Molecular epidemiological characteristics of norovirus gastroenteritis outbreaks in Guangdong from 2005 to 2008].

To study the molecular epidemiological characteristics of norovirus gastroenteritis outbreaks in Guangdong, we collected fecal and anal swabs specimens from 24 outbreaks of acute gastroenteritis from 2005 to 2008 to detect norovirus. Specimens were detected by RT-PCR and then sequenced. The descriptive data were also collected.

[Investigation of human metapneumovirus in children with acute respiratory tract infections in Guangzhou areas].

Objective: To find out the status of human metapneumovirus (hMPV) infection in children under 14 years old with acute respiratory tract infections (ARI) in Guangzhou, analyze the epidemiology and clinical characteristics among the hMPV-infected children, and provide some basis for research of hMPV.

Methods: All 521 throat and pharyngeal swabs were collected among the children with acute respiratory tract infections in outpatient departments and those admitted to the wards from September 2006 to August 2008. Then total nucleic acid was extracted from respiratory specimens.

Multiple outbreaks of acute hemorrhagic conjunctivitis due to a variant of coxsackievirus A24: Guangdong, China, 2007.

Acute hemorrhagic conjunctivitis (AHC) is usually caused by enterovirus 70, coxsackievirus A24(CA24v) and adenoviruses. Several outbreaks of AHC caused by a CA24v have occurred since it was imported into China in 1971. Multiple outbreaks of AHC reappeared in 10 cities of Guangdong during June to November in 2007.