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Image: In black and white: three fossil flowers from the Cretaceous (Glandulocalyx, Normanthus,Platydiscus; enlarged). In colour: four present-day species (Cymbidium, Primula,Hyacinthoides, and Passiflora). Credit: Julia Asenbaum.

Floral Time Travel: Flowers Were More Diverse 100 Million Years Ago Than They Are Today

By | Botany, News

An team botanists has analyzed the morphological diversity of fossilized flowers and compared it with the diversity of living species. Their results were quite exciting: Flowering plants had already produced a large number of different flower types shortly after their emergence in the Cretaceous period, and this earliest floral diversity was greater than that today.

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Arabidopsis_thaliana_root_growth_in_vitro Credit: Alena Kravchenko / Wikimedia

Plants recruit distinct chemical activities of coumarins under different soil pHs

By | News, Plant Science

Iron is an essential micronutrient for plants and is generally found in large quantities in the Earth’s crust. However, its availability to plants is highly dependent on the pH value of the soil. When suffering from iron deficiency, certain plant species release coumarins. Which type of these small secondary metabolites is mainly released depends on the pH value of the soil. Now, a research team has shown how different coumarins are used to maximize iron uptake under acidic and alkaline conditions.

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Researchers fill new final gaps in the Arabidopsis genome sequence

By | News, Plant Science

A new study unveils the intricate organization and regulation of ribosomal RNA genes within the complete nucleolus organizer regions (NORs) of Arabidopsis, the first plant with a fully sequenced genome. The research identifies over 70 gene subtypes distributed between NOR2 and NOR4, shedding light on their activation and silencing patterns. The findings, crucial for comprehending NOR epigenetic control, hold broad biomedical relevance and offer a platform for future investigations into NOR evolution.

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Image: Native Eucalyptus forest growing in the field site located in Cleland Conservation Park - the largest conservation reserve used in the study (1027.47 ha). Credit: A Blackall (Flinders)

Night study of native plant survival

By | Botany, News

With land clearance, bushfires, weeds and climate change, small pockets of native vegetation are important for future plant and animal conservation – but do plants in small reserves struggle with reduced habitat for both plants and their pollinators?

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Measuring the impact of desert greening

By | Climate change, KAUST, News, Plant Science

Satellite data reveals a significant cooling impact of vegetation on land surface temperature in the Arabian Peninsula. The study underscores the potential of greening dry areas to mitigate heat stress. The balance between increased evapotranspiration and reduced albedo determines outcomes, emphasizing the need for sustainable water management in climate change adaptation.

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Image: Mutations in plant DNA can be observed as mild effects in some "variegated" plants, where leaves become bleached and lose the ability to photosynthesize (see image). While this may be beautiful in your garden, it is not beneficial for crops. Credit: Iain George Johnston

New findings on plants’ ingenious defense against mutational damage

By | News, Plant Science

Plants avoid mutational damage buildup by leveraging randomness in a process called segregation. Unlike passing on the same mutation to all offspring, plants distribute inherited damage randomly, with some offspring inheriting more mutations than others. This segregation process, faster in plants than in humans, holds agricultural promise. Understanding how plants handle mutational variations in their DNA could aid crop breeders in introducing beneficial mutations for enhanced yield. The study’s findings advance knowledge crucial for crop breeding and yield enhancement.

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