Comprehensive tools for ecological restoration of soils foster sustainable use and resilience of agricultural land.

Soils are the backbone of terrestrial ecosystems, underpinning their biodiversity and functioning. They are also key to agricultural production and ecosystem development. Although focus on effective and profitable food production has led to severely degraded soils, the tools and standards for restoration strategies in agricultural soils are still largely underdeveloped.

Prezygotic mate selection is only partially correlated with the expression of NaS-like RNases and affects offspring phenotypes.

Nicotiana attenuata styles preferentially select pollen from among accessions with corresponding expression patterns of NaS-like-RNases (SLRs), and the postpollination ethylene burst (PPEB) is an accurate predictor of seed siring success. However, the ecological consequences of mate selection, its effect on the progeny, and the role of SLRs in the control of ethylene signaling remain unknown. We explored the link between the magnitude of the ethylene burst and expression of the SLRs in a set of recombinant inbred lines (RILs), dissected the genetic underpinnings of mate selection through genome-wide association study (GWAS), and examined its outcome for phenotypes in the next generation.

Exploring the future of GM technology in sustainable local food systems in Colombia.

The security of Earth's food systems is challenged by shifting regional climates. While agricultural processes are disrupted by climate change, they also play a large role in contributing to destabilizing greenhouse gases. Finding new strategies to increase yields while decreasing agricultural environmental impacts is essential.

Integrating plant and fungal quantitative genetics to improve the ecological and agricultural applications of mycorrhizal symbioses.

Finding and targeting genes that quantitatively contribute to agricultural and ecological processes progresses food production and conservation efforts. Typically, quantitative genetic approaches link variants in a single organism's genome with a trait of interest. Recently, genome-to-genome mapping has found genome variants interacting between species to produce the result of a multiorganism (including multikingdom) interaction.

TOC1 in Nicotiana attenuata regulates efficient allocation of nitrogen to defense metabolites under herbivory stress.

The circadian clock contextualizes plant responses to environmental signals. Plants use temporal information to respond to herbivory, but many of the functional roles of circadian clock components in these responses, and their contribution to fitness, remain unknown. We investigate the role of the central clock regulator TIMING OF CAB EXPRESSION 1 (TOC1) in Nicotiana attenuata's defense responses to the specialist herbivore Manduca sexta under both field and glasshouse conditions.

Allelic differences of clustered terpene synthases contribute to correlated intraspecific variation of floral and herbivory-induced volatiles in a wild tobacco.

Plant volatile emissions can recruit predators of herbivores for indirect defense and attract pollinators to aid in pollination. Although volatiles involved in defense and pollinator attraction are primarily emitted from leaves and flowers, respectively, they will co-evolve if their underlying genetic basis is intrinsically linked, due either to pleiotropy or to genetic linkage. However, direct evidence of co-evolving defense and floral traits is scarce.

Determining the scale at which variation in a single gene changes population yields.

Plant trait diversity is known to influence population yield, but the scale at which this happens remains unknown: divergent individuals might change yields of immediate neighbors (neighbor scale) or of plants across a population (population scale). We use plants silenced in mitogen-activated protein kinase 4 (irMPK4) - with low water-use efficiency (WUE) - to study the scale at which water-use traits alter intraspecific population yields. In the field and glasshouse, we observed overyielding in populations with low percentages of irMPK4 plants, unrelated to water-use phenotypes.

The Clock Gene TOC1 in Shoots, Not Roots, Determines Fitness of under Drought.

The highly conserved core circadian clock component () contextualizes environmental stress responses in plants, for example by gating abscisic acid signaling and suppressing thermoresponsive growth. Selective interaction of TOC1 with PHYTOCHROME B under far-red-enriched light suggests a connection between circadian gating of light responses and sensitivity to ABA, an important regulator of growth and stress responses, including under drought. However, the fitness consequences of TOC1 function, particularly in the root, are poorly understood.

Blumenols as shoot markers of root symbiosis with arbuscular mycorrhizal fungi.

High-through-put (HTP) screening for functional arbuscular mycorrhizal fungi (AMF)-associations is challenging because roots must be excavated and colonization evaluated by transcript analysis or microscopy. Here we show that specific leaf-metabolites provide broadly applicable accurate proxies of these associations, suitable for HTP-screens. With a combination of untargeted and targeted metabolomics, we show that shoot accumulations of hydroxy- and carboxyblumenol C-glucosides mirror root AMF-colonization in plants.

The Active Jasmonate JA-Ile Regulates a Specific Subset of Plant Jasmonate-Mediated Resistance to Herbivores in Nature.

The jasmonate hormones are essential regulators of plant defense against herbivores and include several dozen derivatives of the oxylipin jasmonic acid (JA). Among these, the conjugate jasmonoyl isoleucine (JA-Ile) has been shown to interact directly with the jasmonate co-receptor complex to regulate responses to jasmonate signaling. However, functional studies indicate that some aspects of jasmonate-mediated defense are not regulated by JA-Ile.

Cry1Ac production is costly for native plants attacked by non-Cry1Ac-targeted herbivores in the field.

Plants are the primary producers in most terrestrial ecosystems and have complex defense systems to protect their produce. Defense-deficient, high-yielding agricultural monocultures attract abundant nonhuman consumers, but are alternatively defended through pesticide application and genetic engineering to produce insecticidal proteins such as Cry1Ac (Bacillus thuringiensis). These approaches alter the balance between yield protection and maximization but have been poorly contextualized to known yield-defense trade-offs in wild plants.

Tissue-Specific Emission of (E)-α-Bergamotene Helps Resolve the Dilemma When Pollinators Are Also Herbivores.

More than 87% of flowering plant species are animal-pollinated [1] and produce floral scents and other signals to attract pollinators. These floral cues may however also attract antagonistic visitors, including herbivores [2]. The dilemma is exacerbated when adult insects pollinate the same plant that their larvae consume.

Studies of phenylalanine hydroxylase activity in patients with chronic renal failure: the effect of haemodialysis.

The effect of serum from patients with renal failure on phenylalanine hydroxylase activity has been measured in normal individuals, patients with steady-state chronic renal failure and patients undergoing haemodialysis. Significant inhibition of enzyme activity was induced by serum from patients with steady-state chronic renal failure but not from patients undergoing haemodialysis. Inhibitor(s) was readily diffusible in vitro and appeared to have an approximate molecular mass of 800.

Cerebrospinal fluid amino acid concentrations in patients with viral and tuberculous meningitis.

Serial measurements have been made of the cerebrospinal fluid and plasma amino acid concentrations in 11 patients with viral meningitis and in four with tuberculous meningitis. A small increase in the concentrations of a few amino acids in cerebrospinal fluid has been found in a viral meningitis in contrast to a marked increase in most amino acids in tuberculous meningitis. The findings are compared with those found in patients with purulent meningitis and the possible causes and the diagnostic significance of these findings are discussed.

Abnormalities of cerebrospinal fluid amino acids in patients with the Guillain-Barré syndrome.

Measurements of cerebrospinal fluid (CSF) and plasma amino acid concentrations have been made in 12 patients with the Guillain-Barré syndrome. The CSF protein concentration was normal in seven specimens and raised in 13. Abnormalities of the CSF amino acid profile were found in all specimens but were more marked in those with a raised CSF protein concentration.

Dissociated renin-aldosterone response to acute sodium depletion in patients with a previous history of pregnancy-associated hypertension.

The effect of sodium depletion on body weight, plasma renin activity (PRA) and plasma aldosterone concentration has been studied in 10 normotensive subjects with a previous history of pregnancy-associated hypertension. The results demonstrate an appropriate increase in PRA but a suppression of plasma aldosterone response to this form of acute sodium depletion. The significance of this dissociated renin-aldosterone response is discussed.

Exaggerated natriuresis in normotensive subjects with a previous history of pregnancy-associated hypertension.

The effect of an isotonic saline infusion on urinary sodium excretion and plasma renin activity (PRA) has been studied in 11 normotensive patients with a previous history of pregnancy-associated hypertension. The results have been compared with a group of controls matched for age, sex and parity. The results demonstrate an exaggerated natriuresis and a suppressed PRA response in the patients with a previous history or pregnancy-associated hypertension which is similar to those reported in patients with established 'essential' hypertension.

Abnormalities of cerebrospinal fluid amino-acids in purulent meningitis.

Serial measurements were made of the cerebrospinal fluid and plasma amino-acid concentrations in 12 patients with purulent meningitis. Marked increases in the concentrations of most CSF amino-acids were found, possibly caused by altered transport mechanisms in the inflamed meninges and choroid plexuses.

The effect of haemodialysis on cerebrospinal fluid and plasma amino acids.

The concentration of free amino acids in CSF and plasma has been measured in 19 patients with renal disease undergoing haemodialysis therapy. The values obtained have been compared with those measured in non-haemodialysed patients. At the end of a 10-h dialysis period, the total CSF amino acid concentration had fallen by only 23.

Studies of cerebrospinal fluid and plasma amino acids in patients with steady-state chronic renal failure.

The concentration of free amino acids in the plasma and lumbar CSF of 11 patients with steady-state chronic renal failure has been measured and the CSF: plasma concentration ratios calculated. The results have been compared with the corresponding data from 37 control subjects. In renal failure, elevation of the mean plasma concentration of total amino acids and a reduction in the ratio of essential to total amino acids have been found.