Australian Journal of Botany
Volume 70
Number 7 2022
The occurrence of large-scale fires is increasing globally. Adverse impacts of these fires on plants and ecosystems can be significant without rapid management responses. We developed novel predictive frameworks to identify the species and vegetation types in most urgent need of post-fire intervention to promote successful recovery after such megafires. The frameworks described here are applicable to major fire events in a diverse range of biomes across the world.
Among several characteristics, fire is a natural factor in the Brazilian Cerrado; so, the plant species occurring in this biome have several adaptations because of this characteristic. We studied Astronium fraxinifolium, a tree native to this biome, in its juvenile phase, that sprouts quickly after the fire. The information obtained in this study shows that A. fraxinifolium is a regrowth plant in post-fire events, and can be used in the restoration and reforestation of Cerrado areas.
Cancer bush is a multipurpose medicinal legume endemic to southern Africa, reported to grow in a variety of soils, from very poor to fertile ones. There is limited knowledge on how cancer bush is able to adapt in diverse soils and, particularly, nothing has been reported on the benefits from the microbe symbiosis, plant growth and acclimation to low-nutrient soils. Cancer bush has developed adaptations to maximise P and N assimilation under limited soil P availability by establishing symbiosis with phospho-bacteria and N2-fixing bacteria and switching N sources between soil N and atmospheric N to reserve energy to optimise plant growth in impoverished soils.