Physiologia Plantarum

Physiologia Plantarum Physiologia Plantarum is an international journal committed to publishing the best full-length origi

🌱 How can we grow crops with less fertilizer while still keeping them productive?The researchers here studied root devel...
11/06/2026

🌱 How can we grow crops with less fertilizer while still keeping them productive?

The researchers here studied root development in Brassica napus under different nitrogen conditions.

Nitrogen is essential for plant growth, but excessive fertilization is costly & not environmentally sustainable.

🔬 The team analyzed how different genetic lines respond to low & high nitrate levels.

📉 Under low nitrate, plants increased their root-to-shoot ratio & grew longer primary roots to improve nutrient uptake.

However, the growth of lateral roots varied depending on the genetic background of the plants.

The researchers found that the interaction between genetics & nitrate levels strongly influenced root traits.

They identified 36 genomic regions linked to root development, known as QTLs.

Some of these regions were consistent across different populations & conditions, making them especially important.

These regions contain candidate genes involved in nitrogen response & root growth regulation.

🌍 Overall, this research highlights genetic targets that could help breed crops needing less fertilizer while maintaining productivity.

https://bit.ly/42UB9Uk

🌾 How do some rice plants thrive in iron-rich, acidic soils where others fail?🧪 Iron toxicity, especially from ferrous i...
10/06/2026

🌾 How do some rice plants thrive in iron-rich, acidic soils where others fail?

🧪 Iron toxicity, especially from ferrous iron (Fe²⁺) in acidic soils, is a major barrier to rice production in regions like South America, Africa, & Asia.

🌧️ Waterlogged, low-oxygen conditions make Fe²⁺ even more available to plants, amplifying the stress on rice crops.

🌱 Interestingly, certain regional rice varieties show a natural tolerance to high iron, making them valuable models for understanding stress resilience.

🧬 Here the researchers reviewed how rice plants respond to iron toxicity, focusing on key genes involved in iron transport, homeostasis, & tolerance pathways.

🧩 Using transcriptomic analyses, they explored gene expression patterns in six rice lines — both iron-tolerant & iron-sensitive — across different developmental stages.

🧠 A meta-analysis revealed that genotype, growth stage, & treatment conditions all shape how rice responds to iron overload.

📌 They identified marker genes linked to excess iron response & examined how the encoded proteins are distributed within plant cells.

🔍 Despite major progress, knowledge gaps remain, pointing to the need for deeper exploration of molecular mechanisms in iron tolerance.

🌍 These insights are crucial for breeding rice varieties that can maintain high yields in iron-toxic soils, improving food security in vulnerable regions.

https://bit.ly/3YRNN4o

🌾 How do plants protect themselves from toxic heavy metals like cadmium?Here the researchers studied stress responses in...
09/06/2026

🌾 How do plants protect themselves from toxic heavy metals like cadmium?

Here the researchers studied stress responses in Oryza sativa seedlings exposed to cadmium.

⚠️ Cadmium stress disrupted photosynthesis & nitrogen metabolism, while increasing harmful reactive oxygen species.

This stress also weakened the plant’s antioxidant defenses & disturbed its internal chemical balance.

🧬 The researchers investigated two signaling molecules, hydrogen sulfide & GABA, to see how they help plants cope.

Both GABA & hydrogen sulfide improved plant growth, chlorophyll levels & restored key metabolic processes under stress.

They also strengthened antioxidant systems & helped rebalance cellular redox conditions.

Interestingly, GABA promoted the formation of aerenchyma, a tissue that helps plants adapt to stress, while hydrogen sulfide did not.

GABA also reduced harmful deposits in roots caused by cadmium exposure.

Overall, GABA showed a stronger protective effect than hydrogen sulfide.

The results suggest that GABA may act downstream of hydrogen sulfide in the plant’s stress signaling network.

This study highlights how these molecules could be used to improve crop resilience to heavy metal stress.

https://bit.ly/4tZWirh

🌿 Did you know that mitochondria within a single leaf can function differently depending on the cell type?🔬 Here the res...
08/06/2026

🌿 Did you know that mitochondria within a single leaf can function differently depending on the cell type?

🔬 Here the researchers isolated mitochondria from mesophyll, vascular, and guard cells using a specialized method (IMTACT) & analyzed their proteomes.

⚙️ At steady state, mitochondria from vascular & guard cells showed higher levels of proteins for respiration (mtETC), the TCA cycle, and metabolism of several amino acids like glutamate, proline, & branched-chain amino acids.

🧩 Interestingly, guard cell mitochondria had fewer proteins involved in the translation machinery, raising questions about protein turnover in these cells.

🌑 When plants were exposed to carbon starvation (3–6 days of darkness), all cell types showed a rise in proteins linked to branched-chain amino acid metabolism.

🥀 However, guard cell mitochondria were severely impacted, with major reductions in proteins for respiration, translation, & RNA editing, indicating a strong downregulation of mitochondrial activity.

🌱 In contrast, mesophyll & vascular cell mitochondria remained largely stable, with only minor shifts in amino acid metabolism.

🧬 These findings reveal that leaf mitochondria are not all the same — they adapt cell-specifically to both normal function & stress, like prolonged darkness.

https://bit.ly/4bM0Iwj

🌞 How do plants adapt when both light conditions & CO₂ levels fluctuate in their environment?🌿 Here the researchers expl...
06/06/2026

🌞 How do plants adapt when both light conditions & CO₂ levels fluctuate in their environment?

🌿 Here the researchers explored how cucumber plants respond to fluctuating light (FL) vs. sinusoidal light (SN) under both ambient (a[CO₂]) & elevated CO₂ (e[CO₂]) levels.

🌱 Under a[CO₂], FL-grown plants showed greater plasticity in traits like stem height, leaf area & specific leaf area (SLA) compared to SN-grown plants.

🧪 Interestingly, the increase in SLA under FL was mostly due to lower leaf density, not thickness.

📉 However, this plasticity came at a cost, dry biomass dropped by 25% under FL, likely due to reduced photosynthetic efficiency during the day (lower Adiurnal).

🌬️ When CO₂ levels were elevated (e[CO₂]), the negative impact of FL was partially reduced, biomass was only 11% lower compared to SN.

📊 This improvement was linked to enhanced shoot biomass, better leaf traits, and higher photosynthetic performance under e[CO₂].

🌾 Overall, fluctuating light reduces plant productivity, but elevated CO₂ helps offset these effects through morphological and anatomical adjustments.

https://bit.ly/49QLBzc

🍅 What controls whether tomatoes turn rich purple under light exposure?Here the researchers studied anthocyanin producti...
05/06/2026

🍅 What controls whether tomatoes turn rich purple under light exposure?

Here the researchers studied anthocyanin production in Solanum lycopersicum, focusing on a special line that produces pigments in response to light.

Anthocyanins are important compounds with antioxidant benefits & give plants their red, purple, & blue colors.

🧬 The team investigated a regulatory system involving a microRNA called miR156 & a gene named SlSPL15.

🔬 They found that SlSPL15 & miR156a show opposite expression patterns during fruit development and they confirmed that miR156a can directly break down SlSPL15 transcripts, controlling its activity.

When SlSPL15 was overexpressed, the tomatoes produced less anthocyanin in their fruits.

This reduction was linked to lower activity of key genes involved in the anthocyanin biosynthesis pathway.

Even genes that respond to light & normally promote pigment production were less active in these plants.

Further analysis showed that SlSPL15 works inside the nucleus & interacts with other regulators of pigment formation.

🍅 Overall, this study reveals how the miR156/SlSPL15 module helps control light-induced pigmentation in tomatoes.

https://bit.ly/4dEb02l

🌳 How does a tiny fungus threaten entire peach orchards in Italy?🍑 Prunus persica (peach) is one of the most important f...
04/06/2026

🌳 How does a tiny fungus threaten entire peach orchards in Italy?

🍑 Prunus persica (peach) is one of the most important fruit crops globally, especially in Spain & Italy.

⚠️ A major threat to peach trees is twig canker & shoot blight (TCSB), primarily caused by the fungus Diaporthe amygdali.

🌿 This disease leads to dieback of shoots, flowers, leaves, & branches, usually in late winter or early spring.

🔬 Here the researchers studied D. amygdali isolates from symptomatic trees in Emilia Romagna, a key peach-producing region in northern Italy.

🧬 They used morphological & molecular analyses to better understand the pathogen.

🌡️ They also tested mycelial growth at different temperatures to determine the fungus’s optimal growing conditions.

🧠 These findings help build decision support systems to guide targeted & effective disease control, supporting more sustainable peach production with reduced agrochemical use.

https://bit.ly/49ueS3N

This special issue publishes a collection of 17 review articles on up-to-date methodologies to monitor stress response a...
03/06/2026

This special issue publishes a collection of 17 review articles on up-to-date methodologies to monitor stress response and resilience in crop plants at various levels.
ToC https://bit.ly/4fzPpZW
Editorial https://bit.ly/4uAt0QQ
All articles are free to read for 2 months
Have a look!

🌡️ How do plants with different growth forms adapt to rising temperatures & water stress?🌿 Here the researchers studied ...
02/06/2026

🌡️ How do plants with different growth forms adapt to rising temperatures & water stress?

🌿 Here the researchers studied hemiepiphytic (H) & non-hemiepiphytic (NH) Ficus species to explore how their root, leaf & stem traits differ under environmental stress.

🍃 H species had smaller but thicker leaves, higher leaf mass per area & leaf dry matter content, helping them retain water better.

🌳 They also showed higher wood & root density, which supports drought tolerance in challenging habitats.

🌱 In contrast, NH species had larger leaves, higher stomatal density, and roots with greater surface area, maximizing resource uptake in well-watered environments.

🔗 NH plants invest in high-connectivity resource networks, while H species rely on low-connectivity but more flexible root systems.

🧬 The study revealed consistent adaptive patterns in both above- & below-ground traits, showing how growth form influences survival strategies.

📘 These findings deepen our understanding of how different Ficus species are equipped to face climate challenges through distinct structural adaptations.

https://bit.ly/4jK56xI

🤔SnRK1 protein kinases play a pivotal role in regulating plant development, growth signaling, and stress responses by ma...
01/06/2026

🤔SnRK1 protein kinases play a pivotal role in regulating plant development, growth signaling, and stress responses by managing cellular responses to energy fluctuations. SnRK1 activation was thought to depend mainly on the phosphorylation of threonine at position 175 (Thr175) within the activation loop. However, recent phosphoproteomic studies have identified additional phosphorylation sites.

🔎 Authors explored the functional significance of these modifications, focusing on serine at position 176 (Ser176), adjacent to Thr175 in SnRK1α1. Our results reveal that dual phosphorylation of Ser176 and Thr175 is vital for optimal SnRK1 activity. Structural modeling and thermodynamic analyses highlight the critical role of these modifications in optimising substrate positioning and enzymatic efficiency.

📌Furthermore, only the wild-type SnRK1α1, which can be phosphorylated at both sites, retains full functionality in in vivo experiments with yeast and Arabidopsis. Interestingly, pSer176 exhibits greater stability than pThr175 at various times throughout the day.

👉Mutant proteins with substitutions at these sites (T175A/S176A mutants) accumulate in cytoplasmic aggregates after heat shock, suggesting a strong link between phosphorylation status, protein stability, and SnRK1 degradation pathways.

Read more https://bit.ly/4tXqHGW

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