De onde vieram os baobás? Cientistas desvendam mistério

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[{"selector":"#anim-5b3d2e08-9f47-476e-9a9f-273a40a461c7","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-27c9d8af-6a57-4259-90e3-21be4e13e5f8","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8f118749-8c53-47b6-b1d0-11930c8e9bf5","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-13a13869-d665-4e59-9e17-b41c3dba4106","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Baobás podem viver por mais de mil anos, atuando como espécies-chave em ambientes de floresta seca em Madagascar, uma faixa da África continental e noroeste da Austrália WIKIMEDIA COMMONS

[{"selector":"#anim-3ae43947-e371-4c52-b206-a3237c66dfd1","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6b0aa5bf-fa3e-445d-bf3f-023bdeef278b","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-caf4c8e2-73a0-437a-bfc3-2e94dc4eeb4c","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-cc2c1843-c36c-4824-be2d-7fc1459e0627","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Até agora, a ciência teve que se contentar com múltiplas hipóteses conflitantes sobre sua origem – a teoria dominante sendo que elas vieram da África continental WIKIMEDIA COMMONS

[{"selector":"#anim-6953793d-6123-42ed-bf10-c2985430fc93","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-ea7a4fb9-b28c-48ed-9bb2-39a602b7f18d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-73028d26-9fd9-4385-98ac-57308d0f3156","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-b0ccb3a3-af49-45b3-b569-adf2bcfc7f87","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Mas uma equipe de acadêmicos internacionais sequenciou com sucesso os genomas de cada uma das oito espécies de baobás PXHERE

[{"selector":"#anim-779356b5-a933-43e4-a637-83904a662731","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8e153c8a-c12c-4737-bc41-98f95f42638d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-9be660c7-6910-4cfb-96a8-693d37584a2e","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-7c42cab9-30d7-4a36-bd22-f2b7e0f76c8a","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] E, examinando a relação entre elas, concluíram que os baobás se originaram em Madagascar WIKIMEDIA COMMONS

[{"selector":"#anim-88d8bde2-2bcc-4c4c-9f47-a1ff03a40df3","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-24345602-7290-4f1a-b90d-d3a765135bb7","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-4de51e26-7c9f-4f92-894c-80b131b1d7ec","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-11ecf7eb-232c-4d76-ba73-3e9fe842ccce","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] A história começa com o surgimento dos baobás em Madagascar há cerca de 21 milhões de anos , antes que o gênero (nome científico Adansonia) começasse a se diversificar PXHERE

[{"selector":"#anim-52b17960-7a50-4e4a-92fa-6c8635971913","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-b2590eb4-b971-46e4-8318-574cebee83ed","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-19d31e5e-1a53-4e47-9471-58c30650f848","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-304af66a-5ca9-45e3-b4ce-7a6b63493647","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Duas espécies teriam chego à atual África e Austrália há 12 milhões de anos, antes da separação do "supercontinente" Gondwana PXHERE

[{"selector":"#anim-26603318-78d2-478f-868d-d5daa4f65b49","keyframes":{"opacity":[0,1]},"delay":0,"duration":1500,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8613f991-c48d-4021-9c36-1abe225b9851","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-bc805bc2-d6f1-4494-afd0-7e4938d014b5","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-e2a7da51-b8f5-4a90-b20c-1a781396d097","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}] Hoje, três espécies de baobá estão ameaçadas de extinção em Madagascar, sendo que uma delas pode ser extinta em 50 anos sem maiores intervenções UNSPLASH

CNNBRASIL.COM.BR

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