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cucurbit

Plant Links of the Day: Diverse Citrus, Extinct Cucurbits, and more

When I woke up (which yes, was only a couple hours ago, but remember I’m on pacific time) I found a whole bunch of interesting plant links waiting in my RSS reader, and I thought I’d pass along a few to you guys.

Keith Robinson writing over at Omics! Omics! posted Celebrating Citrus where he catelogs some of the diversity available to him from local grocery stores before pointing out a citrus review article that suggests all that diversity can be traced back to only three wild species and wraps it up by pointing out the project to sequence the sweet orange genome.

Imagine if you could have a whole series of clementine-like fruits, with the size & easy peeling characteristics but with the whole range of other citrus flavors and colors genetically grafted in — cara cara clementines and blood clementines and ruby red clementines and perhaps even sweet lemontines and key clemenlimes.

Highly recommended.

The Biogeography of Darwin’s Gourd is a post I discovered through research blogging (speaking of which I should really write another entry that meets their standards some day). The gourd of the title is Sicyos villosus, a cucurbit (the group of plants that includes squashes, melons, and pumpkins) collected by Darwin from one of the islands in the Galapagos the better part of two centuries ago … and never again recorded by science. At this point the dried sample collected by Darwin may be the only existence the species ever lived:

The analysis of the cucurbit’s DNA, extracted from the seed samples taken by Darwin, revealed that S. villosus is closest in relation to cucurbits in North America and Mexico. The species probably diverged roughly 4 mya, when the Galapagos were still geologically young. Dispersal was not human in origin, meaning long distance from the mainland, potentially from its spiny fruits stuck to birds, the authors suggest.

How cool is it that we can learn so much from a single sample of a species that has otherwise vanished from the earth?

Finally, by way of DailyKos, comes a pointer to this valentine’s day themed article, clearly written for the non-scientist, where a summary written by me seems superfluous given the title: Sex, Drugs, and Paleo-botany! And yes, the exclamation point is in the original title as well.

How to Give an Interesting Research Talk?

Corngrass1 a dominant mutant that keeps maize from making the transition to adult growth. The stalk of a normal maize plant is shown to the left for comparison. According to George Chuck, in some genetic backgrounds where they never flower, corngrass plants are potentially immortal, as cuttings of the stalk can be transplanted to new soil and simply continue to grow. (Normally corn plants are annuals, they stop growing once the end of their stalk turns into a tassel and eventually die off even if they're grown in temp. controlled greenhouses.) Photo courtesy of MaizeGDB.org

Just got back from a great talk given by George Chuck, who works on microRNAs that control the transitions between the juvinile and adult phases of plant development in maize at the USDA’s Plant Gene Expression Center. In trying to figure out why it was such a great talks (besides the obvious, that he had exciting data to present).

The obvious ones I could spot where: (more…)