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古树名木是一种文化。确切地说，是一笔文化遗产，是一种文化现象。
古树名木是一种风景名胜。形象地说，古树名木是活着的画，凝固的诗。
古树名木是历史和先人留下来的宝贵财富，是爱国主义教育的活教材

“植树造林维国策，栽花种草蔚家风”。中华民族向来有植树造林、爱护树木的传统。
愿所有的朋友都能继承这一传统，热爱古树名木，保护古树名木

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银杏科银杏属 Ginkgo biloba
树龄约600年
来源《京津冀古树寻踪》

XUSDP CRYPTO

蔷薇科苹果属 Malus micromalus
树龄约200年
来源：《京津冀古树寻踪》

CLAW EXCHANGES

GIFTONEW APP

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Oaks are an important part of our natural and cultural heritage. Not only are they ubiquitous in our most common landscapes1 but they have also supplied human societies with invaluable services, including food and shelter, since prehistoric times2. With 450 species spread throughout Asia, Europe and America3, oaks constitute a critical global renewable resource. The longevity of oaks (several hundred years) probably underlies their emblematic cultural and historical importance. Such long-lived sessile organisms must persist in the face of a wide range of abiotic and biotic threats over their lifespans.

AKASH APP

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Land vegetation is currently taking up large amounts of atmospheric CO2, possibly due to tree growth stimulation. Extant models predict that this growth stimulation will continue to cause a net carbon uptake this century. However, there are indications that increased growth rates may shorten trees' lifespan and thus recent increases in forest carbon stocks may be transient due to lagged increases in mortality. Here we show that growth-lifespan trade-offs are indeed near universal, occurring across almost all species and climates. This trade-off is directly linked to faster growth reducing tree lifespan, and not due to covariance with climate or environment.

GYMAI EXCHANGES

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Because plants do not possess a defined germline, deleterious somatic mutations can be passed to gametes, and a large number of cell divisions separating zygote from gamete formation may lead to many mutations in long-lived plants. We sequenced the genome of two terminal branches of a 234-year-old oak tree and found several fixed somatic single-nucleotide variants whose sequential appearance in the tree could be traced along nested sectors of younger branches. Our data suggest that stem cells of shoot meristems in trees are robustly protected from the accumulation of mutations.

BLITZPREDICT APP

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Somatic mutations can have important effects on the life history, ecology, and evolution of plants, but the rate at which they accumulate is poorly understood and difficult to measure directly. Here, we develop a method to measure somatic mutations in individual plants and use it to estimate the somatic mutation rate in a large, long-lived, phenotypically mosaic Eucalyptus melliodora tree. Despite being 100 times larger than Arabidopsis, this tree has a per-generation mutation rate only ten times greater, which suggests that this species may have evolved mechanisms to reduce the mutation rate per unit of growth.