Nitrogen is needed for proteins, DNA and the chlorophyll that let plants perform photosynthesis.

氮是蛋白质、DNA和让植物进行光合作用叶绿素所必需。

They contain chlorophyll, which helps create various colors.

他们所含叶绿素颜色深浅不同。

They're just hidden by the abundance of green chlorophyll during the warmer months.

它们只是在温暖被大量绿色叶绿素掩盖。

It's a major component of all proteins and chlorophyll.

它是所有蛋白质和叶绿素主要成分。

And not all parts of a leaf always have the same amount of chlorophyll.

叶子所有分并非拥有相同数量叶绿素。

As the chlorophyll in a tree's leaves begins to wane, these underlying pigments become visible.

随着树叶中叶绿素开始减少，这些潜在色素变得可见。

They're able to transfer the sun's energy and create a chemical known as chlorophyll.

树叶能够转移太阳能量，产生一种被称为叶绿素化学物质。

Plant cells also contain chloroplasts which are filled with a chemical called chlorophyll.

植物细胞还包含叶绿体，里面充满了一种叫做叶绿素化学物质。

Then comes the chlorophyll-rich palisade mesophyll, where the bulk of photosynthesis occurs.

然后是富含叶绿素掌状中叶，大分光合作用在这里发生。

Drops in chlorophyll fluorescence may also occur before visible signs of plant stress, making it a timely measure.

此外，叶绿素荧光下降可能会发生在有植物承压明显迹象表现出来之前，因此用叶绿素荧光测量会比较及时。

During this process, sunlight hits structures within a plant's cells called chloroplasts, which are packed with chlorophyll pigments.

在光合作用中，太阳光照射在植物细胞里一些叫做叶绿体结构上，而这些叶绿体中含有大量叶绿素色素。

Like Monotropa — with no green, chlorophyll-packed leaves to photosynthesize with, it hardly resembles a plant at all.

就像水晶兰属——没有绿色、富含叶绿素叶子来进行光合作用，它一点也不像植物。

Or maybe plants were even more clever and turned the weakness of chlorophyll into a strength?

也可能是植物更聪明，将叶绿素弱点转换为其强项？

And this is where chlorophyll really shines.

这才是叶绿素真正闪光地方。

Because chlorophyll is green, and plants are full of it.

因为叶绿素是绿色，而植物充满了叶绿素。

Of course, weather can play a role in this as well, especially on the vibrancy of it.

当然，天气也在其中发挥了作用，尤其是在叶绿素活方面。

The chlorophyll inside the leaves traps light from the sun.

叶子内叶绿素吸收来自太阳光。

But wait a second: doesn't the fact that chlorophyll is green mean that it's actually bad at absorbing green light?

正是因为叶绿素是绿色，所以不是不利于吸收绿光吗？

The phytoplankton form the basis of a food web which supports larger organisms such as krill, fish, seabirds and marine mammals.

浮游植物是含有叶绿素类似植物微生物。浮游植物构成了食物网基础，食物网支持较大生物，比如磷虾、鱼类、海鸟和海洋哺乳动物。

But they noticed that the leaves had more chlorophyll, so they were greener.

但他们发现这些叶子含有更多叶绿素，因此颜色更绿。