Water deficit effects on canopy light interception, chlorophyll fluorescence, and stomatal conductance in Moroccan alfalfa genotypes

被引：0

作者：

Mouradi, Mohammed ^{[1
]}

Farissi, Mohamed ^{[1
]}

Lahrizi, Yahya ^{[2
]}

Oukaltouma, Khawla ^{[2
]}

Saaidi, Afaf ^{[3
]}

Khadraji, Ahmed ^{[2
]}

Bouizgaren, Abdelaziz ^{[4
]}

Ghoulam, Cherki ^{[2
,5
]}

机构：

[1] Sultan Moulay Slimane Univ, Polydisciplinary Fac, Unit Biotechnol & Sustainable Dev Nat Resources B, Beni Mellal, Morocco

[2] Fac Sci & Tech, Unit Biotechnol & Symbiosis Agrophysiol, Marrakech, Morocco

[3] Georgia Inst Technol, Sch Math, Atlanta, GA 30332 USA

[4] Natl Inst Agron Res INRA, Unit Plant Breeding, Marrakech, Morocco

[5] Mohammed VI Polytech Univ, Agrobiosci AgBs Program, Benguerir, Morocco

来源：

PLANT PHYSIOLOGY REPORTS | 2022年 / 27卷 / 03期

关键词：

Alfalfa; Chlorophyll fluorescence; Leaf area index; Photosynthetically active radiation; Stomatal conductance; Water deficit; RADIATION-USE EFFICIENCY; LEAF GAS-EXCHANGE; PHOTOSYNTHETICALLY ACTIVE RADIATION; SATIVA L. CULTIVARS; DROUGHT STRESS; OSMOTIC ADJUSTMENT; RESPONSES; GROWTH; YIELD; PRODUCTIVITY;

D O I：

10.1007/s40502-022-00668-7

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Water deficit is the major constraints causing negative effects on forage crops in many regions worldwide especially North Africa. This constraint will aggravate because of climate change in the future. The present study aims to assess several physiological and biochemical parameters in three alfalfa varieties subjected to severe water deficit. Plants were irrigated with 100% ETc (crop evapotranspiration) water amount as well-watered and 50% ETc as water deficit. The results showed that water deficit significantly reduced dry matter (DM), photosynthetically active radiation (PAR(i)), light conversion (eb) and electron transport rate in all the studied genotypes. Adis variety had the lowest DM reduction of 22.7% under water stress. Moapa (MO) showed a reduction of 51.5%. The lowest eb value of 1.57 kg/mu mol m(-2) d(-1) was observed for MO under water stress. Overall, next to biomass and water uptake, the photosynthetic parameters may constitute additional reliable criteria for the selection of water deficit tolerant variety of alfalfa to support the breeding program by INRA for the Mediterranean well adapted alfalfa varieties.

引用

页码：469 / 480

页数：12