Tag Archives: pollination

July 2022 in Review

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I have been traveling and unable to overcome my own security features while outside the US. Ironically, during the first time in years I had some significant downtime for reading, thinking, and posting. Not to worry, I thumb-typed out a few posts and am cutting and pasting them now, so the posts should keep rolling in for awhile.

Most frightening and/or depressing story: One way global warming is suppressing crop yields is by damaging pollen.

Most hopeful story: Kernza is a perennial grain with some promise, although yields would have to increase a lot for it to be a viable alternative to annual grains like wheat, corn and rice.

Most interesting story, that was not particularly frightening or hopeful, or perhaps was a mixture of both: You can see lightning as much as 100-200 miles away if it is high enough, but the sound from thunder only travels about 15 miles. So if you hear thunder, lightning is close enough to be dangerous and you should take shelter. If you only see lightning far away, you may be able to safely stay outside. Just keep listening.

climate change and pollen

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It makes intuitive sense to me that heat would reduce crop yields, just by stressing many plants as they try to conserve water and limit evaporation. I hadn’t considered the way heat might affect pollen production and pollinators, but this is also an issue.

But one point is becoming alarmingly clear to scientists: heat is a pollen killer.

Even with adequate water, heat can damage pollen and prevent fertilisation in canola and many other crops, including corn, peanuts, and rice. For this reason, many farmers aim for crops to bloom before the temperature rises…

In fact, heat hinders not only tube growth but other stages of pollen development as well. The result: a pollen grain may never form, or may burst, fail to produce a tube, or produce a tube that explodes. 

BBC

It sounds like research is needed just to hold the line on the crop yields we have now, let alone achieve the increases we need to meet projected population and consumption growth. The more I think about climate change and the broad range of issues it is going to cause, the more I think food may be the most critical issue.