FT-mediated thermal signalling regulates age-dependent inflorescence development in Arabidopsis thaliana.

Many plants show strong heteroblastic changes in the shape and size of organs as they transition from juvenile to reproductive age. Most attention has been focussed on heteroblastic development on leaves, but we wanted to understand heteroblastic changes in reproductive organ size. We therefore studied the progression of reproductive development in the model plant Arabidopsis thaliana, and found strong reductions in the size of flowers, fruit, seed, and internodes during development. These did not arise from correlative inhibition by older fruits, or from changes in inflorescence meristem size, but seemed to stem from changes in the size of floral organ primordia themselves. We hypothesised that environmental conditions might influence this heteroblastic pattern and found that the ambient temperature during organ initiation strongly influences organ size. We show that this temperature-dependent heteroblasty is dependent on FLOWERING LOCUS T (FT) mediated signal integration, adding to the repertoire of developmental processes regulated by this pathway. Our results demonstrate that rising global temperatures will not just affect fertility, as is widely described, but also the size and seed number of fruits produced. However, we also show that such effects are not hard-wired, and that selective breeding for FT expression during reproductive development could mitigate such effects.

Carbon, nitrogen, and phosphorus dynamics in China's lakes: climatic and geographic influences.

Given the differences in geomorphology, climate, hydrology, and human activities in various regions, lake chemometrics may also vary. However, the spatial distribution of lake chemistry and the factors affecting such pattern are still unclear. Here, we collected data for carbon, nitrogen, and phosphorus from published literature and databases in 224 lakes and calculated the trophic status index to represent the nutrient classification state of lakes. We found that lakes with high carbon concentrations were located in the Tibet-Qinghai Limnetic Region of western China, whereas lakes with high nitrogen and phosphorus concentrations were located in the Inner Mongolia-Xinjiang Limnetic Region and Northeast Limnetic Region of northern China. Areas with larger cropland and urban residential land (such as the junction of the three lake regions, i.e., the Northeast Limnetic Region, East Limnetic Region, and Inner Mongolia-Xinjiang Limnetic Region) tended to have lakes with high nitrogen and phosphorus concentrations. Our analysis suggested that spatial distribution of carbon, nitrogen, and phosphorus concentrations reflect the effect of climate, geomorphology, and land use in each lake region and nationwide.

Precopulatory oral sex contact plays an important role in copulatory success in a cryptic desert beetle.

Precopulatory courtship plays an essential role in the insemination process and influences postcopulatory behavior between males and females. Male precopulatory oral stimulation of female genitals is rare for invertebrates. Here, we describe an intriguing oral sexual courtship in a cryptic desert beetle Platyope mongolica Faldermann. The males repeatedly contact the female's genitals using their mouths to gain consent to mate. Furthermore, the rate at which males contact the female's genitals relates to the copulation success in a series of observations. However, interference in oral sexual contacts decreased the proportion of successful copulation. Further no-choice tests found homosexual behavior between males with antenna removed. We report the precopulatory oral sexual behavior and its important role for copulation success in P. mongolica for the first time. These findings highlight the significance of oral sexual courtship in sexual selection.

A Statewide Tiered System for Screening and Diagnosis of Autism Spectrum Disorder.

Although autism spectrum disorder (ASD) can be reliably detected in the second year of life, the average age of diagnosis is 4 to 5 years. Limitations in access to timely ASD diagnostic evaluations delay enrollment in interventions known to improve developmental outcomes. As such, developing and testing streamlined methods for ASD diagnosis is a public health and research priority. In this report, we describe the Early Autism Evaluation (EAE) Hub system, a statewide initiative for ASD screening and diagnosis in the primary care setting. Development of the EAE Hub system involved geographically targeted provision of developmental screening technical assistance to primary care, community outreach, and training primary care clinicians in ASD evaluation. At the EAE Hubs, a standard clinical pathway was implemented for evaluation of children, ages 18 to 48 months, at risk for ASD. From 2012 to 2018, 2076 children were evaluated (mean age: 30 months; median evaluation wait time: 62 days), and 33% of children received a diagnosis of ASD. Our findings suggest that developing a tiered system of developmental screening and early ASD evaluation is feasible in a geographic region facing health care access problems. Through targeted delivery of education, outreach, and intensive practice-based training, large numbers of young children at risk for ASD can be identified, referred, and evaluated in the local primary care setting. The EAE Hub model has potential for dissemination to other states facing similar neurodevelopmental health care system burdens. Implementation lessons learned and key system successes, challenges, and future directions are reviewed.

Care Coordination Using a Shared Plan of Care Approach: From Model to Practice.

INTRODUCTION: Children and youth with special health care needs (CYSHCN) need, but do not have, adequate care coordination (CC); CC leads to better pediatric care, improved family/professional experience of care, and enhanced population health. Current CC initiatives are promising but lack adherence to emerging definitions/standards. A Lucile Packard Report provides guidelines for using a Shared Plan of Care (SPoC) as a CC approach; studied implementation is needed. PURPOSE: The studied implementation of the Riley Care Coordination Program (RCCP) set out to: 1) illuminate components of family-centered, interdisciplinary, team-based care/coordination and SPoC, use 2) underscore family participation/engagement 3) reveal implementation processes/lessons learned. METHODS: Children (ages 2-10) with neurodevelopmental disabilities were referred by subspecialists; families agreed to participate in RCCP from a children's hospital ambulatory care setting. RCCP team used a five-phase workflow to implement CC: (1) Family Outreach/Engagement 2) Family and Team Pre-Visit Work, 3) Population-Based Teamwork, 4) Planned-Care Visits/SPOC "Co-Production", 5) Ongoing Care Coordination and Community Transfer. Family surveys and SPoC goals informed an evaluation. RESULTS: Children (268) with neurodevelopmental disabilities enrolled/completed the 6-month RCCP; it was a feasible endeavor. The co-produced SPoC supported families/care neighborhood partners to meet goals/unmet needs. Team plan-do-study-act improvement cycles informed RCCP enhancements. DISCUSSION/CONCLUSION: Eliciting/using family goals to drive CC emphasized family priorities; children/families gained interventions, treatments, confidence and navigation skills. Going beyond episodic, reactive care, RCCP achieved better CC with care neighborhood learning partnerships. Investing in this quality care coordination with fidelity to national standards holds promise.

Effects of a Care Coordination Intervention with Children with Neurodevelopmental Disabilities and Their Families.

: Care coordination is integral to improving the health of children and families. Using a Shared Plan of Care (SPoC) as a care coordination activity is recommended, but related research on outcomes in pediatric populations with complex medical conditions is scarce. OBJECTIVE: This study explores family outcomes associated with implementation of a care coordination/SPoC intervention with a population of children with neurodevelopmental disabilities and their families. METHODS: Children aged 2 to 10 years with a neurodevelopmental disability (autism spectrum disorder: 60.9%; global developmental delay/intellectual disability: 39.1%) were referred by pediatric subspecialty programs for care coordination. The intervention included previsit assessments, planned care visits, SPoC development, and 6-month care coordination. A single-group, repeated-measures design was used to evaluate model feasibility and effects on care coordination access, SPoC use, family/clinician goals and needs met, family-professional partnerships, family empowerment, and worry. Times 1 and 2 survey data were collected from a total of 70 families. RESULTS: Analysis shows significant improvement in care coordination access, SPoC use, goals achieved, needs met, family empowerment, and reduced worry. There was no significant change in family-professional partnerships and reported SPoC use. CONCLUSION: Findings provide preliminary evidence that a care coordination model using a family-centered, goal-oriented SPoC is a feasible and effective approach with a cohort of children with complex neurodevelopmental disorders and is associated with improved family outcomes. Replication studies are warranted and should include a control group, prolonged time period, additional validated outcome measures, and measurement of costs and professional impact.

The effects of methylphenidate on prepulse inhibition during attended and ignored prestimuli among boys with attention-deficit hyperactivity disorder.

RATIONALE AND OBJECTIVES: The present study investigated attentional modification of prepulse inhibition of startle among boys with and without attention-deficit hyperactivity disorder (ADHD). Two hypotheses were tested: (1) whether ADHD is associated with diminished prepulse inhibition during attended prestimuli, but not ignored prestimuli, and (2) whether methylphenidate selectively increases prepulse inhibition to attended prestimuli among boys with ADHD. METHODS: Participants were 17 boys with ADHD and 14 controls. Participants completed a tone discrimination task in each of two sessions separated by 1 week. ADHD boys were administered methylphenidate (0.3 mg/kg) in one session and placebo in the other session in a randomized, double-blind fashion. During each series of 72 tones (75 dB; half 1200-Hz, half 400-Hz), participants were paid to attend to one pitch and ignore the other. Bilateral eyeblink electromyogram startle responses were recorded in response to acoustic probes (50-ms, 102-dB white noise) presented following the onset of two-thirds of tones, and during one-third of intertrial intervals. RESULTS: Relative to controls, boys with ADHD exhibited diminished prepulse inhibition 120 ms after onset of attended but not ignored prestimuli following placebo administration. Methylphenidate selectively increased prepulse inhibition to attended prestimuli at 120 ms among boys with ADHD to a level comparable to that of controls, who did not receive methylphenidate. CONCLUSIONS: These data are consistent with the hypothesis that ADHD involves diminished selective attention and suggest that methylphenidate ameliorates the symptoms of ADHD, at least in part, by altering an early attentional mechanism.