TY - JOUR
T1 - Monochromatic red light during plant growth decreases the size and improves the functionality of stomata in chrysanthemum
AU - Seif, Mehdi
AU - Aliniaeifard, Sasan
AU - Arab, Mostafa
AU - Mehrjerdi, Mahboobeh Zare
AU - Shomali, Aida
AU - Fanourakis, Dimitrios
AU - Li, Tao
AU - Woltering, Ernst
PY - 2021/1/18
Y1 - 2021/1/18
N2 - Light emitting diodes (LEDs) now enable precise light quality control. Prior to commercialisation however, the plant response to the resultant light quality regime ought to be addressed. The response was examined here in chrysanthemum by evaluating growth, chlorophyll fluorescence (before and following water deficit), as well as stomatal anatomy (density, size, pore dimensions and aperture heterogeneity) and closing ability. Plants were grown under blue (B), red (R), a mixture of R (70%) and B (RB), or white (W; 41% B, 39% intermediate spectrum, 20% R) light LEDs. Although R light promoted growth, it also caused leaf deformation (epinasty) and disturbed the photosynthetic electron transport system. The largest stomatal size was noted following growth under B light, whereas the smallest under R light. The largest stomatal density was observed under W light. Monochromatic R light stimulated both the rate and the degree of stomatal closure in response to desiccation compared with the other light regimes. We conclude that stomatal size is mainly controlled by the B spectrum, whereas a broader spectral range is important for determining stomatal density. Monochromatic R light enhanced stomatal ability to regulate water loss upon desiccation.
AB - Light emitting diodes (LEDs) now enable precise light quality control. Prior to commercialisation however, the plant response to the resultant light quality regime ought to be addressed. The response was examined here in chrysanthemum by evaluating growth, chlorophyll fluorescence (before and following water deficit), as well as stomatal anatomy (density, size, pore dimensions and aperture heterogeneity) and closing ability. Plants were grown under blue (B), red (R), a mixture of R (70%) and B (RB), or white (W; 41% B, 39% intermediate spectrum, 20% R) light LEDs. Although R light promoted growth, it also caused leaf deformation (epinasty) and disturbed the photosynthetic electron transport system. The largest stomatal size was noted following growth under B light, whereas the smallest under R light. The largest stomatal density was observed under W light. Monochromatic R light stimulated both the rate and the degree of stomatal closure in response to desiccation compared with the other light regimes. We conclude that stomatal size is mainly controlled by the B spectrum, whereas a broader spectral range is important for determining stomatal density. Monochromatic R light enhanced stomatal ability to regulate water loss upon desiccation.
KW - blue light
KW - Chrysanthemum morifolium
KW - indoor horticulture
KW - LED
KW - light emitting diode
KW - light quality
KW - O-J-I-P-transient
KW - red light
KW - stomatal anatomy
KW - stomatal closing ability
KW - stomatal size
KW - white light
U2 - 10.1071/FP20280
DO - 10.1071/FP20280
M3 - Article
AN - SCOPUS:85099666474
JO - Functional Plant Biology
JF - Functional Plant Biology
SN - 1445-4408
ER -