Axillary bud isLateral budOne of, especially fromleaf axilGeneratedAdventitious bud。Axillary buds are common inseed plantOfCommon leafMedium, leaves without axillary lateral buds are rare, butSquama leaf, flower leaves or most fern leaves generally do not differentiate into axillary buds.[1]
Axillary bud isLateral budOne of, especially fromleaf axilGeneratedAdventitious bud。Axillary buds are common inseed plantOfCommon leafMedium, leaves without axillary lateral buds are rare, butSquama leaf, mosaic or majorityFernIts leaves generally do not differentiate into axillary buds.
morphological character
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fromStem apexgrowing pointNewLeaf primordiumAfter that, the axillary bud primordium of its young leaf primordium soon differentiated, and generally dormant after a little development.Usually everyleaf axilOne axillary bud is formed between them, but some species can also produce more than two axillary buds.In principle, the arrangement of axillary buds on the main shaft is similar to that of the plantphyllotaxySame, but in treesSecondary growthDo not renderConcentric circleTherefore, this arrangement is less inclined.
The axillary bud is on the side of the branchleaf axilInner bud, also calledLateral bud。usuallyperennialDeciduous plantAfter the leaves fall, the axillary buds on the branches are very significant. The axillary buds near the base of the branches are often smaller. In a leaf axil, there is usually only one axillary bud, such as poplarLiu, apples, etc.But some plants such asHoneysuckleThere is more than one axillary bud in some or all leaf axils of peach, mulberry, cotton, etcAccessory bud。Some axillary buds grow at a lower position and are covered in the base of the petiole. The buds do not emerge until the leaves fall, which is calledLower petiole bud, such asplane tree(Sycamore)locustThe axillary buds are equal, and the petioles with buds under the petioles are often enlarged at the base.In agriculture, in order to increase yield, it is necessary to avoid both too high plant growth and axillary bud growth.Often pickingterminal budAftertoppingApply a certain concentration ofauxin。
Axillary bud development
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The order of differentiation and development of leaf branch buds and fruit branch buds is as follows: if the axillary bud primordium first differentiates and shortens the internode and leaves first, then differentiates and lengthens the internode and leaf primordium,Apical meristemThe bract primordium that differentiates the flower bud, which is the fruit branch bud and forms the first branch axis (commonly known as the first fruit node).Then, in the axillary bud of the leaf primordium of the branch axis, the second branch axis (the second fruit node) is formed in the above order, and the multi axis fruit branch is formed along this differentiation, which is called the multi axis branch.When the axillary bud differentiates and shortens the internode and leaves first, the apical meristem continuously differentiates and elongates the internode and the true leaf primordium, it is called a leaf bud, which later develops into a leaf branch. Because there is only one branch axis, it is calledUniaxially branched。[2]
