采后枇杷果实衰老过程中的硬度增加与冷害胁迫下的果实组织木质化具有相似的基本特征，但其内在机制可能不同。
The increase in firmness during postharvest loquat fruit senescence showed similar characteristic to tissue lignification of chilling injury, however, the mechanism might be different.
不同部位的木质化的程度不同，原生木质部中只有轻微的加厚，而在厚壁组织和一些木质部导管中则进一步加厚，平均含25%-30%的木质素和50%的纤维素。
The degree of lignification varies from slight in protoxylem to heavy in sclerenchyma and some xylem vessels, but values of 25-30% lignin and 50% cellulose are average.
次生生长包括维管组织形成、次生细胞壁形成、木质化、PCD以及心材形成等过程。
The secondary growth includes several consecutive processes such as vascular tissue differentiation, secondary cell wall deposition, lignification, PCD and heart wood formation.
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