Early development of two savanna tree species under simulated dry spells

Chaib, Adalgisa Maria; Gomes, Anabele Stefânia; Borghetti, Fabian

doi:10.1016/j.flora.2023.152241

Cited by 1 publication

(3 citation statements)

References 57 publications

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Section: Discussionsupporting

confidence: 84%

“…Likewise, the Q. grandiflora seed reserves were also proteins and lipids (proteins: 7%, lipids: 37%), though their proportion may vary from species to species (Mayworm et al, 2011). The fact that Al, lipids, and protein shared the same storage site (cotyledons) is consistent with the data that this metal significantly enhances the metabolism of Q. grandiflora plants, which could help to explain their higher success rate of seedling establishment (Chaib et al, 2023). 4.2.1 | Most of the proteins in Q. grandiflora seeds were used for germination and seedling establishment Regarding Q. grandiflora seeds, only about 30% of their original concentration of proteins was accounted for in the 42-day-old seedlings.…”

supporting

confidence: 73%

“…Thus, it is of paramount relevance to not only determine and quantify Q. grandiflora seed reserves and Al but also investigate their respective location sites and the redistribution and usage from germination to seedlings. Moreover, it has been shown that Q. grandiflora seedlings are very resilient even in harsh conditions such as during dry spells (Chaib et al, 2023). Seed structure and reserve components are crucial for seedling establishment.…”

Section: Introductionmentioning

confidence: 99%

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Qualea grandiflora Mart. (Vochysiaceae) seed reserves and aluminum: Usage and mobilization during germination and seedling development

Castro,

Vinson,

Almeida

et al. 2024

Plant Species Biology

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Qualea grandiflora Mart. is an aluminum (Al)‐accumulating Cerrado species with a metabolic dependency on Al. This study aimed to determine the presence and concentration of Al and other reserve components in Q. grandiflora seeds, as well as their respective distribution patterns, mobilization, and usage during germination and seedling growth. Thus, the concentration of Al and other minerals in seeds, seedlings, and soils was measured. Also, histochemical and energy‐dispersive X‐ray spectroscopy (EDS) analyses were performed to observe the distribution of Al, proteins, and lipids in Q. grandiflora seeds and seedlings. Additionally, the concentration of proteins and lipids was assessed as well. Hence, even in soils with low exchangeable Al3+, Q. grandiflora seeds accumulated about 6.43 g of Al/kg of dry matter (DM) together with considerable concentrations of N, P, K, Ca, and Mg. Exogenous Al had no effect on the germination properties of Q. grandiflora seeds. Furthermore, approximately 60% of the seed Al was translocated to seedling leaves. Proteins and lipids were the main organic reserves in Q. grandiflora seeds. The histochemical analysis revealed that the bulk of Al in seeds was in the cotyledons, which were also the location sites of proteins and lipids. Proteins and lipids were the primary source of energy and carbon for seedling growth. Therefore, fatty acids, proteins, and Al could play a central role during seed germination and seedling establishment, which could help to explain why this species is one of the most widespread plants in the Cerrado.