首页|Effect of light on growth and chlorophyll development in kiwifruit ex vitro and in vitro

Effect of light on growth and chlorophyll development in kiwifruit ex vitro and in vitro

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  • NSTL
  • Elsevier
Light is one of the most important environmental factors that strongly mediates plant physiological and morphological development. Few studies have investigated the effect of light on perennial fruit crops, which have long generation times and are large in size, that complicates the evaluation of plant responses to light in controlled environments. This study assessed the impact of light intensity on chlorophyll (Chl) variation in 41 kiwifruit cultivars during the growing season, and examined the physiological, morphological and gene expression changes of kiwifruit plantlets in vitro under different light qualities treatments, such as white light, red light (RL), blue light (BL) and a mixture of RL and BL with different ratios. The Chl content in 24.4% of kiwifruit varieties increased continuously with increasing sunlight intensity from April to August; but 34.15% of varieties remained unchanged and 41.5% of varieties decreased in July and August when kiwifruit plants were exposed to maximum solar radiation density and duration. The controlling experiment of light qualities showed that blue light was effective for the induction and accumulation of kiwifruit Chl contents and carbon nitrogen ratio (C/N ratio), as well as the numbers of guard cell plastids, whereas red light induced plant vegetative growth and increased starch and sucrose content in leaves. Furthermore, blue light induced higher expression of key genes for Chl biosynthesis than red light. These results indicate that kiwifruit plants exhibit strong morphological plasticity induced by light, and the development of kiwifruit can be induced by culturing the plants in vitro under a combination of BL and RL.

KiwifruitChlorophyll contentLight qualityRLBL ratioPhysiological variation

Liu Xiaoying、Yang Mingjuan、Xie Xiaodong、Khaldun, A. B. M.、Atak, Arif、Zhong Caihong、Li Dawei

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Chinese Acad Sci, Wuhan Bot Garden, CAS, Engn Lab Kiwifruit Ind Technol, Wuhan 430074, Peoples R China

Xian Univ, Sch Biol & Environm Engn, Xian 710065, Shaanxi, Peoples R China

Bangladesh Agr Res Inst, Gazipur 1701, Bangladesh

Ataturk Hort Cent Res Inst, Dept Viticulture, TR-77102 Yalova, Turkey

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2022

10.1016/j.scienta.2021.110599

Scientia horticulturae

Scientia horticulturae

SCI
ISSN：0304-4238
年,卷(期)：2022.291
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