Shutterstock 收錄高畫質 (HD) 庫存圖片，以及其他數百萬個素材，包括免版稅庫存照片、3D 物體、插圖與向量圖，歡迎從中尋找「Leaf bw」相關內容。 每天新增數千張高品質圖片。

One Leaf Icon on Black and White Vector Backgrounds. This vector illustration includes two variations of the icon one in black on a light background on the left and another version in white on a dark background positioned on the right.

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Shop bw leaf fabric by the yard, wallpapers and home decor items with hundreds of amazing patterns created by indie makers all over the world. Print and sell your own designs, too!

The best selection of Royalty-Free Leaf Black and White Vector Art, Graphics and Stock Illustrations. Download 730,000+ Royalty-Free Leaf Black and White Vector Images.

Find & Download Free Graphic Resources for Black And White Leaves Vectors, Stock Photos & PSD files. Free for commercial use High Quality Images

结果表明：叶片长度（BL）、叶片宽度（BW）、叶面积（LA）、叶片干重（LDW）、叶片厚度（LT）、栅栏组织厚度（PT）、净光合速率（Pn）、气孔电导（Gs）、脯氨酸（Pro）和丙二醛（MDA）含量随着发育阶段的进展而增加。 BL、BW、LA、叶片干重、LT、PT、Pn、Gs、Pro以及MDA、吲哚乙酸、玉米素核苷含量与叶片冠层高度及发育阶段呈显着正相关。 随着冠层高度的增加和发育阶段的进行，白杨叶片的形态结构和生理特征表现出更明显的耐旱结构特征和更高 …

Find & Download Free Graphic Resources for Bw Leaf. 99,000+ Vectors, Stock Photos & PSD files. Free for commercial use High Quality Images

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Find Leaf Bw stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Thousands of new, high-quality pictures added every day.