Effects of gradual soil drought stress on the growth, biomass partitioning, and chlorophyll fluorescence of Prunus mongolica seedlings

YOUYAN GUO; Hongyuan YU; Dongsheng KONG; Fang YAN; Donghua LIU; YAJUAN ZHANG

doi:https://doi.org/10.3906/biy-1412-20

Makale detayları

Effects of gradual soil drought stress on the growth, biomass partitioning, and chlorophyll fluorescence of Prunus mongolica seedlings

Yazarlar:

YOUYAN GUO | Hongyuan YU | Dongsheng KONG | Fang YAN | Donghua LIU | YAJUAN ZHANG

Yayıncı:

TUBITAK

Ana Başlıklar:

Yaşam bilimleri

Dergi:

Turkish Journal of Biology 2015 Vol.39 Issue 4, pp.532-539

Belge Tipi:

Makale

Yayın Tarihi:

8/2015

Belge Dili:

İngilizce

Document ID (Org No.):

2000811869

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

DOI:

https://doi.org/10.3906/biy-1412-20

Anahtar kelimeler:

Özet:

 

The present studyaimed to determine the effects of gradual drought stress on Prunus mongolica seedlings. The growth and chlorophyll fluorescence of the seedlings were investigated under drought and control conditions. The short-term (21 day) decline in soil water content from 30.46% to 15.55% did not significantly influence the growth of P. mongolica seedlings but increased the height, basal diameter, crown, leaf number, stem mass, leaf mass, and root mass of the seedlings. The growth of the drought group reached the maximum, but remained lower than that of the control group, within 21 days. Compared with the control group, the drought group showed 1.46%, 9.65%, 9.44%, 5.19%, 29.09%, 19.20%, and 0.03% lower height, basal diameter, crown, leaf number, stem mass, leaf mass, and root mass, respectively. With the gradual manifestation of soil drought through the decline in soil water content from 15.55% to 11.38% from 21 days to 42 days, growth of the drought group became significantly lower than that of the control group (P < 0.05). The minimal fluorescence decreased and then increased, whereas the nonphotochemical quenching initially increased and then decreased. Thus, P. mongolica can protect the PSII reaction center from damage at the early stage of drought stress. The maximal fluorescence,the maximum quantum yield of PSII, and the photochemical quenching slightly decreased during the initial period of drought stress. These results suggest that drought can slightly influence the openness of PSII reaction centers. This influence was further proven by the decreased quantum yield of PSII. This study provided insights into the adaptive mechanism of P. mongolica seedlings under drought and may serve as a theoretical basis to protect the P. mongolica population. Comparing these responses is crucial for elucidating the drought-tolerance mechanisms in P. mongolica cultivars.

 

The present studyaimed to determine the effects of gradual drought stress on Prunus mongolica seedlings. The growth and chlorophyll fluorescence of the seedlings were investigated under drought and control conditions. The short-term (21 day) decline in soil water content from 30.46% to 15.55% did not significantly influence the growth of P. mongolica seedlings but increased the height, basal diameter, crown, leaf number, stem mass, leaf mass, and root mass of the seedlings. The growth of the drought group reached the maximum, but remained lower than that of the control group, within 21 days. Compared with the control group, the drought group showed 1.46%, 9.65%, 9.44%, 5.19%, 29.09%, 19.20%, and 0.03% lower height, basal diameter, crown, leaf number, stem mass, leaf mass, and root mass, respectively. With the gradual manifestation of soil drought through the decline in soil water content from 15.55% to 11.38% from 21 days to 42 days, growth of the drought group became significantly lower than that of the control group (P < 0.05). The minimal fluorescence decreased and then increased, whereas the nonphotochemical quenching initially increased and then decreased. Thus, P. mongolica can protect the PSII reaction center from damage at the early stage of drought stress. The maximal fluorescence,the maximum quantum yield of PSII, and the photochemical quenching slightly decreased during the initial period of drought stress. These results suggest that drought can slightly influence the openness of PSII reaction centers. This influence was further proven by the decreased quantum yield of PSII. This study provided insights into the adaptive mechanism of P. mongolica seedlings under drought and may serve as a theoretical basis to protect the P. mongolica population. Comparing these responses is crucial for elucidating the drought-tolerance mechanisms in P. mongolica cultivars.

Makale detayları

Effects of gradual soil drought stress on the growth, biomass partitioning, and chlorophyll fluorescence of Prunus mongolica seedlings

Yazarlar: YOUYAN GUO | Hongyuan YU | Dongsheng KONG | Fang YAN | Donghua LIU | YAJUAN ZHANG

Yayıncı: TUBITAK

Ana Başlıklar: Yaşam bilimleri

Dergi: Turkish Journal of Biology 2015 Vol.39 Issue 4, pp.532-539

Belge Tipi: Makale

Yayın Tarihi: 8/2015

Belge Dili: İngilizce

Document ID (Org No.): 2000811869

Sıklık: İki Aylık

eISSN: 1303-6092

pISSN: 1300-0152

DOI: https://doi.org/10.3906/biy-1412-20

Prunus mongolica

seedling

growth

biomass

chlorophyll fluorescence

Sayı

Yazarlar:

YOUYAN GUO | Hongyuan YU | Dongsheng KONG | Fang YAN | Donghua LIU | YAJUAN ZHANG

Yayıncı:

TUBITAK

Ana Başlıklar:

Yaşam bilimleri

Dergi:

Turkish Journal of Biology 2015 Vol.39 Issue 4, pp.532-539

Belge Tipi:

Makale

Yayın Tarihi:

8/2015

Belge Dili:

İngilizce

Document ID (Org No.):

2000811869

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

DOI:

https://doi.org/10.3906/biy-1412-20